See Full Document Text
Official Journal EN
of the European Union L series
2025/1906 30.9.2025
COMMISSION IMPLEMENTING REGULATION(EU) 2025/1906
of 12 September 2025
granting a Union authorisation for the biocidal product family ‘GA 24-50 BPF’ in accordance with
Regulation (EU) No 528/2012 of the European Parliament and of the Council
(Text with EEA relevance)
THE EUROPEAN COMMISSION,
Having regard to the Treaty on the Functioning of the European Union,
Having regard to Regulation (EU) No 528/2012 of the European Parliament and of the Council of 22 May 2012 concerning
the making available on the market and use of biocidal products(1), and in particular Article 44(5), first subparagraph,
thereof,
Whereas:
(1) On 20 September 2016, MC (Netherlands) 1 B.V. submitted an application to the European Chemicals Agency (‘the
Agency’) in accordance with Article 43(1) of Regulation (EU) No 528/2012 for Union authorisation of a biocidal
product family named ‘GA 24-50 BPF’ of product-types 6, 11 and 12, as described in Annex V to that Regulation,
providing written confirmation that the competent authority of the Netherlands had agreed to evaluate the
application. The application was recorded under case number BC-AE027041-75 in the Register for Biocidal Products.
(2) ‘GA 24-50 BPF’ contains glutaraldehyde as the active substance, included in the Union list of approved active
substances referred to in Article 9(2) of Regulation (EU) No 528/2012 for product-types 6, 11 and 12.
(3) On 31 May 2022, the evaluating competent authority submitted, in accordance with Article 44(1) of Regulation (EU)
No 528/2012, an assessment report and the conclusions of its evaluation to the Agency.
(4) On 18 March 2025, the Agency submitted to the Commission its opinion(2), the draft summary of the biocidal
product characteristics (‘SPC’) of ‘GA 24-50 BPF’ and the final assessment report on the biocidal product family, in
accordance with Article 44(3) of Regulation (EU) No 528/2012.
(5) The opinion concludes that ‘GA 24-50 BPF’ is a biocidal product family within the meaning of Article 3(1), point (s),
of Regulation (EU) No 528/2012, that it is eligible for Union authorisation in accordance with Article 42(1) of that
Regulation and that, subject to compliance with the draft SPC, it meets the conditions laid down in Article 19(6) of
that Regulation.
(6) The active substance glutaraldehyde meets the criteria for classification as a substance that can lead to respiratory
sensitisation as defined in Section 3.4.1.1 of Annex I to Regulation (EC) No 1272/2008 of the European Parliament
and of the Council(3). Therefore, that active substance meets the conditions for being considered a candidate for
substitution in accordance with Article 10(1), point (b), of Regulation (EU) No 528/2012 and the evaluating
competent authority performed a comparative assessment of the biocidal product family in accordance with
Article 23(1) of that Regulation. In the comparative assessment no alternative could be identified as the chemical
diversity was considered insufficient to substitute ‘GA 24-50 BPF’. Therefore, the biocidal product family should be
authorised for a period not exceeding 5 years in accordance with Article 23(6) of Regulation (EU) No 528/2012.
(1) OJ L 167, 27.6.2012, p. 1, ELI: http://data.europa.eu/eli/reg/2012/528/oj.
(2) Opinion of 27 February 2025 on the Union authorisation of the biocidal product family ‘GA 24-50 BPF’ (ECHA/BPC/465/2025),
https://echa.europa.eu/opinions-on-union-authorisation.
(3) Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and
packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation
(EC) No 1907/2006 (OJ L 353, 31.12.2008, p. 1, ELI: http://data.europa.eu/eli/reg/2008/1272/oj).
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(7) On 11 April 2025, the Agency transmitted to the Commission the draft SPC in all the official languages of the Union
in accordance with Article 44(4) of Regulation (EU) No 528/2012.
(8) The Commission concurs with the opinion of the Agency and considers it therefore appropriate to grant a Union
authorisation for the biocidal product family ‘GA 24-50 BPF’.
(9) The measures provided for in this Regulation are in accordance with the opinion of the Standing Committee on
Biocidal Products,
HAS ADOPTED THIS REGULATION:
Article 1
A Union authorisation with authorisation number EU-0030162-0000 is hereby granted to MC (Netherlands) 1 B.V. for the
making available on the market and use of the biocidal product family ‘GA 24-50 BPF’ in accordance with the summary of
the biocidal product characteristics set out in the Annex.
The Union authorisation is valid from 20 October 2025 until 30 September 2030.
Article 2
This Regulation shall enter into force on the twentieth day following that of its publication in the Official Journal of the
European Union.
This Regulation shall be binding in its entirety and directly applicable in all Member States.
Done at Brussels, 12 September 2025.
For the Commission
The President
Ursula VON DER LEYEN
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ANNEX
SUMMARY OF PRODUCT CHARACTERISTICS FOR A BIOCIDAL PRODUCT FAMILY
GA 24-50 BPF
Product type(s)
PT06: Preservatives for products during storage
PT11: Preservatives for liquid-cooling and processing systems
PT12: Slimicides
Authorisation number:EU-0030162-0000
R4BP asset number:EU-0030162-0000
PART I
FIRST INFORMATION LEVEL
1. ADMINISTRATIVE INFORMATION
1.1. Family name
Name GA 24-50 BPF
1.2. Product type(s)
Product type(s) PT06: Preservatives for products during storage
PT11: Preservatives for liquid-cooling and processing
systems
PT12: Slimicides
1.3. Authorisation holder
Name MC (Netherlands) 1 B.V.
Name and address of the authorisation holder
Address Montrealweg 15 3197KH Botlek Rotterdam NL
Authorisation number EU-0030162-0000
R4BP asset number EU-0030162-0000
Date of the authorisation 20 October 2025
Expiry date of the authorisation 30 September 2030
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1.4. Manufacturer(s) of the product
Name of manufacturer MC (US) 3 LLC
Address of manufacturer Route 25 West Virginia 25112 Institute, United States
(the)
Location of manufacturing sites MC (US) 3 LLC site 1 Route 25 West Virginia 25112
Institute, United States (the)
Name of manufacturer Microbial Control (Switzerland) GmbH
Address of manufacturer Wolleraustrasse 15-17 CH-8807 Freienbach,
Switzerland
Location of manufacturing sites Microbial Control (Switzerland) GmbH site 1 Geslecht
(Harbour 1931) 9130 Kallo, Belgium
Microbial Control (Switzerland) GmbH site 2
Madoerastraat 10 3199 KR Maasvlakte, Rotterdam,
Netherlands (the)
1.5. Manufacturer(s) of the active substance(s)
Active substance Glutaraldehyde
Name of manufacturer MC (US) 3 LLC
Address of manufacturer Route 25 West Virginia 25112, Institute United States
(the)
Location of manufacturing sites MC (US) 3 LLC site 1 Route 25 West Virginia 25112
Institute, United States (the)
2. PRODUCT FAMILY COMPOSITION AND FORMULATION
2.1. Qualitative and quantitative information on the composition of the family
Common name IUPAC name Function CAS number EC number Content (%)
Glutaraldehyde 1,5-pentane Active 111-30-8 203-856-5 12,9 - 55,3 % (w/w)
dial substance
2.2. Type(s) of formulation
Formulation type(s) AL Any other liquid
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PART II.
SECOND INFORMATION LEVEL META SPC(S)
1. META SPC 1 ADMINISTRATIVE INFORMATION
1.1. Meta SPC 1 identifier
Identifier Meta SPC: meta SPC GA 50
1.2. Suffix to the authorisation number
Number 1-1
1.3. Product type(s)
Product type(s) PT06: Preservatives for products during storage
PT11: Preservatives for liquid-cooling and processing
systems
PT12: Slimicides
2. META SPC 1 COMPOSITION
2.1. Qualitative and quantitative information on the composition of the meta SPC 1
Common name IUPAC name Function CAS number EC number Content (%)
Glutaraldehyde 1,5-pentane Active 111-30-8 203-856-5 48,5 - 55,3 % (w/w)
dial substance
2.2. Type(s) of formulation of the meta SPC 1
Formulation type(s) AL Any other liquid
3. HAZARD AND PRECAUTIONARY STATEMENTS OF THE META SPC 1
Hazard statements H301: Toxic if swallowed.
H314: Causes severe skin burns and eye damage.
H317: May cause an allergic skin reaction.
H330: Fatal if inhaled.
H334: May cause allergy or asthma symptoms or
breathing difficulties if inhaled.
H410: Very toxic to aquatic life with long lasting
effects.
EUH071: Corrosive to the respiratory tract.
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Precautionary statements P260: Do not breathe spray.
P271: Use only outdoors or in a well-ventilated area.
P280: Wear protective gloves.
P284: [In case of inadequate ventilation] wear
respiratory protection.
P273: Avoid release to the environment.
P301+P310: IF SWALLOWED: Immediately call a
POISON CENTER.
P330: Rinse mouth.
P303+P361+P353: IF ON SKIN (or hair): Take off
immediately all contaminated clothing. Rinse skin with
water [or shower].
P304+P340: IF INHALED: Remove person to fresh air
and keep comfortable for breathing.
P310: Immediately call a POISON CENTER.
P305+P351+P338: IF IN EYES: Rinse cautiously with
water for several minutes. Remove contact lenses, if
present and easy to do. Continue rinsing.
P342+P311: If experiencing respiratory symptoms:
Call a POISON CENTER.
P391: Collect spillage.
P403+P233: Store in a well-ventilated place. Keep
container tightly closed.
P501: Dispose of contents to a hazardous waste
disposal service in accordance with the statutory
regulations.
P501: Dispose of container to a hazardous waste
disposal service in accordance with the statutory
regulations.
4. AUTHORISED USE(S) OF THE META SPC
4.1. Use description
Table 1
Short-term preservation of the industrial process, i.e. preservation during the production and/or storage
of latexes (one week) and waterborne paints (three weeks) in the plant prior to final packaging
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
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Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Short-term efficacy to maintain plant hygiene and prevent
intermediate production mixtures of latexes and water-borne
paints from spoiling.
Application method(s) Method: closed system
Detailed description:
The biocidal products are stored either in a single large tank or in
several tanks, and dosed into raw materials or intermediate
mixtures during the production process.
Dose the biocidal product to the end use fluid at a point to ensure
adequate mixing using automated or manual metering.
Application rate(s) and frequency Application Rate:
Paints: 0,1 to 0,95 g glutaraldehyde per kg of matrix for
preventive use.
Paints: 0,1 to 0,95 g glutaraldehyde per kg of matrix with a
contact time of 7 days for curative use. Latexes: 0,1 to 0,6 g
glutaraldehyde per kg of matrix for preventive use.
Latexes: 0,1 to 0,6 g glutaraldehyde per kg of matrix with a
contact time of 7 days for curative use.
Number and timing of application:
Once per production run of the product to preserve.
Glutaraldehyde provides immediate efficacy and short-term
preservation up to three weeks for paints and one week for latexes.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 Imperial Gallon (IG)
(2 273L), material of construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
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4.1.1. Use-specific instructions for use
Dose the biocidal product to the end use fluid at a point to ensure adequate mixing, using automated or manual
metering.
Paints: 0,1 to 0,95 g glutaraldehyde per kg of matrix.
Latexes: 0,1 to 0,6 g glutaraldehyde per kg of matrix.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix or system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.1.2. Use-specific risk mitigation measures
The product must not be added to paints and coatings which are applied by spraying.
See also the general directions for use.
4.1.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.1.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.1.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.2. Use description
Table 2
Preservation of washing and cleaning fluids
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Preservation of washing and cleaning fluids (i.e. hard surface
cleaners (all-purpose cleaners), hand dish washing products, fabric
softeners and laundry detergents).
Application method(s) Method: closed system
Detailed description:
Dose the biocidal product to the end use fluid at a point to ensure
adequate mixing using automated or manual metering.
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Application rate(s) and frequency Application Rate:
0,3 to 0,95 g glutaraldehyde per 1 kg of the final product for
preventive use against bacteria.
0,2 to 0,95 g glutaraldehyde per 1 kg of the final product for
preventive use against yeasts and fungi.
0,3 to 0,95 g glutaraldehyde per 1 kg of the final product with a
contact time of 7 days for curative use against bacteria.
0,2 to 0,95 g glutaraldehyde per 1 kg of the final product with a
contact time of 7 days for curative use against yeasts and fungi.
Number and timing of application:
Once per production run of the product to preserve.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.2.1. Use-specific instructions for use
Dose the biocidal product to the end use fluid at a point to ensure adequate mixing using automated or manual
metering.
Dose:
Bacteria: 0,3 to 0,95 g glutaraldehyde per 1 kg of the final product.
Yeasts & Fungi: 0,2 to 0,95 g glutaraldehyde per 1 kg of the final product.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.2.2. Use-specific risk mitigation measures
See general directions for use.
4.2.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
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4.2.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.2.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.3. Use description
Table 3
Preservation of pigment pastes/mineral slurries to colour a wide variety of products (e.g. textiles, inks,
paints, paper)
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Indoor use
Pigment pastes and mineral slurries used to colour a wide variety
of products (e.g. textiles (carpet fibres, carpet backing, canvas,
cordage, drapes and shower curtains), inks, paints, paper).
Application method(s) Method: closed system
Detailed description:
Good mixing and uniform distribution of the biocidal product
should be ensured using automated or manual metering. Pigment
pastes are readily incorporated by low energy mixing equipment
requiring no additional dispersion.
Application rate(s) and frequency Application Rate:
0,25 to 0,5 g glutaraldehyde per kg of the pigment paste/mineral
slurry for preventive use. 0,25 to 0,5 g glutaraldehyde per kg of
the pigment paste/mineral slurry with a contact time of 2 days for
curative use.
Number and timing of application:
Once per production run of the product to preserve.
Glutaraldehyde provides immediate efficacy and prevents
re-growth for a period up to 3 weeks.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
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— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.3.1. Use-specific instructions for use
Dose the biocidal product to the pigment paste or mineral slurry at a point to ensure adequate mixing using
automated or manual metering.
Dose 0,25 to 0,5 g glutaraldehyde per kg of the pigment paste or mineral slurry.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.3.2. Use-specific risk mitigation measures
See general directions for use.
4.3.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.3.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.3.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.4. Use description
Table 4
Preservation of additives for the production of paper
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Preservation of paper additives used in paper mills.
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Application method(s) Method: closed system
Detailed description:
The biocidal product is automatically added by means of a dosing
pump and dedicated feeding lines in the additives tank.
Application rate(s) and frequency Application Rate:
For bacteria, 0,1 to 0,5 g glutaraldehyde per kg of the paper
additive for preventive use. For yeasts and fungi, 0,25 to 0,5 g
glutaraldehyde per kg of the paper additive for preventive use. For
bacteria, 0,1 to 0,5 g glutaraldehyde per kg of the paper additive
with a contact time of 2 days for curative use. For yeasts and fungi,
0,25 to 0,5 g glutaraldehyde per kg of the paper additive with a
contact time of 2 days for curative use.
Number and timing of application:
Once per production run of the product to preserve.
Glutaraldehyde provides immediate efficacy and prevents
re-growth for a period up to 3 weeks.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.4.1. Use-specific instructions for use
Dose the biocidal product to the paper additive at a point to ensure adequate mixing using automated or manual
metering.
For bacteria, 0,1 to 0,5 g glutaraldehyde per kg of the paper additive.
For yeasts and fungi, 0,25 to 0,5 g glutaraldehyde per kg of the paper additive.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
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4.4.2. Use-specific risk mitigation measures
See general directions for use.
4.4.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.4.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.4.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.5. Use description
Table 5
Preservation of crude oil
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of crude oil with associated water in preparation for
further processing.
Application method(s) Method: closed system
Detailed description:
Batch injection via dosing pump and dedicated feed lines in stored
volume of fuels.
Application rate(s) and frequency Application Rate:
0,025 to 0,4 g glutaraldehyde per liter of water content in crude
oil for preventive use. 0,025 to 0,4 g glutaraldehyde per liter of
water content in crude oil with a contact time of 24 hours for
curative use.
Number and timing of application:
Once per week.
Glutaraldehyde provides immediate efficacy and short-term
preservation up to one week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
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— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.5.1. Use-specific instructions for use
Crude tanks being treated should be at least 10% full before treatment. Do not dispense into empty crude
tanks. When treating storage tanks, please note that effective treatment will only be achieved with efficient
mixing. Ideally, the biocidal product should be dosed into a flowing crude oil stream in the storage tank inlet.
Dose 0,025 to 0,4 g glutaraldehyde per liter of water content in crude oil.
Dose level should be proportional to the risk and level of infection, and anticipated time before the next treatment
or fluid discharge. Dosing system should be a closed system. Adequate agitation is required to ensure homogeneity
throughout the fluid volume.
The dose and frequency strongly depend on the formulation and intended use of the matrix (crude oil) to which
the preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system
to be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.5.2. Use-specific risk mitigation measures
See general directions for use. Additionally:
In case of direct release of the aqueous phase to the sewer the concentration shall not exceed
0,75 mg glutaraldehyde/L.
4.5.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.5.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
Associated water shall be disposed of according to all local and regional regulations.
See general directions for use.
4.5.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.6. Use description
Table 6
Preservation of drilling fluids in the oil and gas industry
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
14/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
Field(s) of use Outdoor use
Preservation of fluids, (e.g., drill muds, cementing fluids, spacer
fluids) used in the drilling of oil, gas and water wells.
Application method(s) Method: closed system
Detailed description:
Periodical injection directly into prepared drilling fluids.
Application rate(s) and frequency Application Rate:
0,25 to 0,5 g glutaraldehyde per liter of drilling fluid with a
contact time of 1 hour for curative use.
Number and timing of application:
Treatment is required when there is evidence, or a very high
likelihood, of microbial degradation of drilling fluids. Treatment
can be repeated as often as required, based on monitoring of
microbial populations and biocide concentration. Resurgent and
robust microbial populations should be treated at most 3 times
per week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.6.1. Use-specific instructions for use
Dose 0,25 to 0,5 g glutaraldehyde per liter of drilling fluid.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
Ensure that treated material is separated from other muds after use. Used drilling fluids must be injected directly
into the formation, collected for reuse in a separate, closed container, or disposed of properly according to local,
state, or federal requirements as described in the SDS. It is not allowed to discharge used drilling fluids overboard.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 15/121EN
OJ L, 30.9.2025
4.6.2. Use-specific risk mitigation measures
Preserved materials must be recycled or disposed of as solid waste.
See also the general directions for use.
4.6.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.6.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.6.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.7. Use description
Table 7
Preservation of fracturing fluids during storage in the oil and gas industry
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of fluids used in the fracturing process.
Application method(s) Method: closed system
Detailed description:
Injection directly into prepared fracturing fluids.
Application rate(s) and frequency Application Rate:
0,25 to 0,5 g glutaraldehyde per liter of fracturing fluid for
preventive use. 0,25 to 0,5 g glutaraldehyde per liter of fracturing
fluid with a contact time of 1 hour for curative use.
Number and timing of application:
Treatment is required when there is evidence, or a very high
likelihood, of microbial degradation of fracturing fluids. Treatment
can be repeated as often as required, based on monitoring of
microbial populations and biocide concentration. Resurgent and
robust microbial populations should be treated at most 3 times
per week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
16/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.7.1. Use-specific instructions for use
Dose 0,25 to 0,5 g glutaraldehyde per liter of fracturing fluid.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.7.2. Use-specific risk mitigation measures
See general directions for use.
4.7.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.7.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
Additional:
Contaminated water arising from cleaning will be collected and removed for disposal according to EU and local
regulations and conditions.
Waste product remaining in containers after use will be returned, in the containers, to the supplier for cleaning/
refilling.
Waste sludge from treatment works will be handled as industrial waste and not spread on land.
4.7.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.8. Use description
Table 8
Preservation of liquids used in closed re-circulating cooling systems
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 17/121EN
OJ L, 30.9.2025
Field(s) of use Indoor use
Outdoor use
Liquid-closed re-circulating cooling/heating and processing
systems.
Application method(s) Method: closed system
Detailed description:
Dosing into the cooling system.
Application rate(s) and frequency Application Rate:
25 to 200 g glutaraldehyde per m3of water.
Number and timing of application:
Bi- or tri- monthly according to the characteristics of the system
and the stability of the biocidal product in the treated water.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.8.1. Use-specific instructions for use
It is recommended to mechanically cleanse dirty systems with fresh water before starting the treatment with the
biocidal product.
Dose in a well-mixed point of the circuit, below the water level. When opening the system for servicing or
maintenance, biocide can be added to reach the initial dosing concentrations.
System monitor
Control the level of biocide with a test kit at least every 3 months and prior to shut off period of the system.
Control microbial contamination with dip slides or other appropriate techniques at least every 3 months.
Particular attention should be addressed during the shut off period of the system where stagnant fluids are more
susceptible to microbial contamination.
Dose 25 to 200 g glutaraldehyde per m3of water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
18/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.8.2. Use-specific risk mitigation measures
Drain off preserved cooling fluids at least five days after the last addition of the biocidal product.
See also the general directions for use.
4.8.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.8.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.8.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.9. Use description
Table 9
Preservation of liquids used in open re-circulating cooling systems
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: green algae
Development stage: no data
Field(s) of use Outdoor use
Liquid-open re-circulating cooling and processing systems.
Application method(s) Method: open system
Detailed description:
Glutaraldehyde is automatically added in the water circuit, usually
as upstream as possible, by means of injection by a dosing pump
and dedicated feeding lines. A timer is used for intermittent
dosage.
Application rate(s) and frequency Application Rate:
25 to 50 g glutaraldehyde per m3of water
Number and timing of application:
Typical dose: 1-2 days.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 19/121EN
OJ L, 30.9.2025
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.9.1. Use-specific instructions for use
For control of microbial growth in industrial cooling water systems treated with a biocidal product by slug dosing.
Not intended for use in once-through cooling systems.
It is recommended to mechanically cleanse dirty systems before starting the treatment with the biocidal product.
Dose in a well-mixed point of the circuit, below the water level.
Typical dose : 1-2 days. Each slug dose lasts 15-30 minutes, depending on the pump capacity and the volume of
water in the circuit. Treatment shall not exceed 2 days.
Dose 25 to 50 g glutaraldehyde per m3of water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.9.2. Use-specific risk mitigation measures
The use is restricted to small cooling systems with a maximum blowdown of 2 m3/h. Waste water must be
discharged to the municipal sewer, purified in an on-site industrial sewage treatment plant including a biological
treatment step, or directly to surface water via a settling pond that allows sufficient retention.
4.9.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.9.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.9.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
20/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.10. Use description
Table 10
Preservation of injection water in the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of injection water in the oil and gas industry.
Application method(s) Method: closed system
Detailed description:
The biocidal product is dosed using automated pumps directly
into the water stream, after mixing of production water and
make-up water into the petroleum reservoir.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
injection water with a contact time of 24 hours. Anaerobic
bacteria: preventive use, 150 to 1 000 g glutaraldehyde per m3of
injection water.
Number and timing of application:
The biocidal product is typically dosed in a weekly batch fashion,
ranging from one to five hours per dose. Batches may occur up to
three times per week in severe cases.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 21/121EN
OJ L, 30.9.2025
4.10.1. Use-specific instructions for use
Glutaraldehyde should be dosed separately from other oil field chemistries such as antifoaming agents, oxygen
scavengers, flocculants, or other oxidizing biocides (e.g. chlorite) in order to prevent cross reactivity. Successive
addition may therefore be required to optimize performance. If a deaerator is being treated with oxidizing
biocides, glutaraldehyde should be dosed downstream of the deaeration unit.
Dose 50 to 1 000 g glutaraldehyde per m3of injection water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.10.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water. This
concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test to determine
the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.10.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.10.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.10.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.11. Use description
Table 11
Preservation of hydro-testing fluids and mothballing fluids in the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of hydro-testing fluids and mothballing fluids in the
oil and gas industry.
22/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
Application method(s) Method: closed system
Detailed description:
Continuous injection into the water stream during the pipeline
filling operation using chemical injection skids equipped with
injection pumps.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
hydro-testing fluid or mothballing fluid with a contact time of 24
hours, depending on the water quality. Anaerobic bacteria:
preventive use, 150 to 1 000 g glutaraldehyde per m3of hydro-
testing fluid or mothballing fluid, depending on the water quality
and required residence time within the equipment.
Number and timing of application:
There is no additional biocide injection into the hydro-testing fluid
once the filling operation is completed.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.11.1. Use-specific instructions for use
Dose 50 to 1 000 g glutaraldehyde per m3 of hydro-testing fluid or mothballing fluid, depending on the water
quality and required residence time within the equipment.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.11.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the hydrotesting and mothballing
fluids. This concentration can be achieved either by slow release and/or long retention times resulting in
degradation of glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at
least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Hydrotest and mothballing water containing up to 750 mg/L glutaraldehyde after the pressure test can be used for
re-injection. Run lab test to determine the soiling dependent dosage and degradation rate in use.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 23/121EN
OJ L, 30.9.2025
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.11.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.11.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.11.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.12. Use description
Table 12
Preservation of water-based fracturing fluids for the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of water-based fracturing fluids for the oil and gas
industry (i.e. shale gas extraction, wet shale extraction, shale oil
extraction, production from tight gas reservoirs, production of
coal bed methane and fracturing in conventional reservoirs).
Application method(s) Method: closed system
Detailed description:
Glutaraldehyde is typically applied in a mixing tank, as it cannot
be exposed to open systems such as the hydraulic fracturing pond
or other open water sources that make up the hydraulic fracturing
pond water. Glutaraldehyde is applied to the mixing tank using
automated pumps, together with other chemicals such as but not
limited to friction reducers, gelling agents, proppants (sand in case
of slick water), corrosion inhibitors.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
fracturing fluid with a contact time of 24 hours. Anaerobic
bacteria: preventive use, 150 to 1 000 g glutaraldehyde per m3of
fracturing fluid.
24/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
Number and timing of application:
In the hydraulic fracturing industry the application of the biocidal
product is typically a single injection, which happens during the
actual fracturing. A new biocide addition is only done when the
well is re-fractured. Refracturing is rare but can be performed up
to 20 times during the lifetime of a well. The lifetime of a well can
reach up to 20 years.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.12.1. Use-specific instructions for use
Typically applied through a closed system to a mixing tank using a pump. Glutaraldehyde may be used in
combination with other chemistries such as friction reducers, gelling agents, proppants, and corrosion inhibitors,
and applied together with these chemistries in the mixing tank(s). If used for intermittent treatments during
operations, a stream of glutaraldehyde will be directly dosed into the process water stream from a separate tank
into a closed system, thereby significantly reducing the chance of exposure.
Dose 50 to 1 000 g glutaraldehyde per m3of fracturing fluid.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.12.2. Use-specific risk mitigation measures
Preserved fracturing fluids are reused where applicable. If discharged into seawater 0,2 mg glutaraldehyde/L
fracturing fluid must not be exceeded. This concentration can be achieved either by slow release and/or long
retention times resulting in degradation of glutaraldehyde and/or by dilution and/or by addition of sodium
bisulphite at pH 5 (release after at least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at
least 10-16 hours) as degradation aids. Run lab test to determine the soiling dependent dosage and degradation
rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 25/121EN
OJ L, 30.9.2025
4.12.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
In addition:
Conditions preventing emissions to water:
Emissions to surface water are prevented through the design of the installation. By way of example spills, leaks and
cleaning solutions may be drained to a lined storage area, preventing release to surface water. Sub-surface releases
of fluid during the fracturing process are prevented from reaching aquifers through the presence of relatively
impermeable formations above the target formation. This limits upward migration of fluid. This is also relevant
for recovered fluids that are re-injected for use or disposal. A minimum vertical separation distance between the
target formation and aquifer should be respected. National legislation may also require a minimum depth.
Recovered water may finally be discharged via one or more large-scale waste water treatment plants where a
combination of physical and biological treatments will reduce emissions to the receiving water.
Conditions preventing emissions to soil:
Emissions, through downward migration are prevented through the design of the installation. By way of example
spills, leaks and cleaning solutions may be prevented from downward migration to soil by the employment of a
non-permeable membrane below the well pad. Sludge from treatment works should not be spread on land.
Existence of standard municipal sewage treatment plant
Waste contractors employed to dispose of recovered water, may do so via a waste water treatment plant,
depending on the properties of the water and conditions of local regulations.
4.12.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
Additional:
Contaminated water arising from cleaning will be collected and removed for disposal according to EU and local
regulations and conditions.
Waste product remaining in containers after use will be returned, in the containers, to the supplier for cleaning/
refilling.
Waste sludge from treatment works will be handled as industrial waste and not spread on land.
4.12.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.13. Use description
Table 13
Preservation of produced water for recycling in the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
26/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
Field(s) of use Outdoor use
Preservation of produced water for recycling in the oil and gas
extraction industry.
Application method(s) Method: closed system
Detailed description:
Dosing using pumps directly into the water stream before being
mixed with fresh injection water and pumped into the petroleum
reservoir.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
produced water with a contact time of 24 hours. Anaerobic
bacteria: preventive use, 150 to 1 000 g glutaraldehyde per m3of
produced water.
Number and timing of application:
Batch treatment: The biocidal product is typically dosed in a
weekly batch fashion, ranging from one to five hours per dose.
Batches may occur up to three times per week in severe cases, but
typically occur once per week.
Continuous treatment: biocide is supplied in a continuous fashion
during operations.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.13.1. Use-specific instructions for use
Dose for the preservation of produced water before re-use 50 to 1 000 g glutaraldehyde per m3of produced water.
This can be done batch wise or continuously.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
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OJ L, 30.9.2025
4.13.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water. This
concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test to determine
the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.13.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.13.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.13.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.14. Use description
Table 14
Slimicide treatment in the wet-end stage of the pulp and paper manufacturing process
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Slimicide treatment in the wet-end stage of the pulp and paper
manufacturing process.
Application method(s) Method: closed system
Detailed description:
Automatic dosing by a pump and fixed pipes into the primary
circuit, usually in the collection sump or in the headbox.
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OJ L, 30.9.2025
Application rate(s) and frequency Application Rate:
Initial dose (wet-end defouling treatment): 250 g glutaraldehyde
per ton paper pulp. Wet-end maintenance dose: 100 g
glutaraldehyde per ton paper pulp.
Number and timing of application:
Initial dose (Wet end de-fouling treatment): 2-6 automatic slug (=
shock) dose additions/day. Repeat 1 to 3 days until control is
achieved.
Wet-end maintenance dose: 2-6 automatic slug dose additions/day,
as necessary to maintain control.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.14.1. Use-specific instructions for use
Dose in a well-mixed point of the primary circuit, below the water level. Heavily fouled systems should be boiled
out prior to initial treatment.
Each slug dose lasts 15-30 minutes.
Initial dose (wet-end defouling treatment): 250 g glutaraldehyde per ton paper pulp.
Wet-end maintenance dose: 100 g glutaraldehyde per ton of paper pulp.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.14.2. Use-specific risk mitigation measures
Application is only allowed in paper factories that comply with the Industrial Emission Directive 2010/75/EU
where wastewater is purified in an on-site industrial sewage treatment plant including a biological treatment step
in accordance to the Best Available Techniques (BAT) as prescribed in the BAT-reference document (BREF) for the
production of pulp, paper and board. The effluent must be diluted at least 200 times. Paper factories that are
exempted from the Industrial Emission Directive must discharge to the municipal sewer.
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OJ L, 30.9.2025
4.14.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.14.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.14.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.15. Use description
Table 15
Slimicide treatment in the de-inking process of the pulp and paper
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Slimicide treatment in the de-inking process of the pulp and
paper.
Application method(s) Method: closed system
Detailed description:
Automatic dosing by pump and fixed pipes into the circuit, usually
in the pulper.
Application rate(s) and frequency Application Rate:
Initial dose (de-fouling treatment): 250 g glutaraldehyde per ton
paper pulp. Maintenance dose: 100 g glutaraldehyde per ton paper
pulp.
Number and timing of application:
Initial dose (de-fouling treatment): 1-2 automatic slug (= shock)
dose additions/day. Repeat for 1 to 2 days until control is achieved.
Maintenance dose: 1-2 automatic slug dose additions/day, as
necessary to maintain control.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
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— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.15.1. Use-specific instructions for use
Dose in a well-mixed point of the primary circuit, below the water level. Heavily fouled systems should be boiled
out prior to initial treatment.
Each slug dose lasts 30 minutes.
Initial dose (de-fouling treatment): 250 g glutaraldehyde per ton paper pulp.
Maintenance dose: 100 g glutaraldehyde per ton paper pulp.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.15.2. Use-specific risk mitigation measures
See general directions for use.
Application is only allowed in paper factories that comply with the Industrial Emission Directive 2010/75/EU
where wastewater is purified in an on-site industrial sewage treatment plant including a biological treatment step
in accordance to the Best Available Techniques (BAT) as prescribed in the BAT-reference document (BREF) for the
production of pulp, paper and board. Paper factories that are exempted from the Industrial Emission Directive
must discharge to the municipal sewer.
4.15.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.15.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.15.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
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OJ L, 30.9.2025
4.16. Use description
Table 16
Slimicide treatment in injection water in the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in injection water in the oil and gas industry.
Application method(s) Method: closed system
Detailed description:
Dosing directly into the water stream using pumps, after mixing of
production water and make-up water and before injection of the
water into the petroleum reservoir.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3injection water.
Number and timing of application:
Batches may occur up to three times per week in severe cases, but
typically occur once per week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.16.1. Use-specific instructions for use
Injection water is often deaerated before being pumped into the sub-surface. Separation of chemical treatments
should be considered when dosing glutaraldehyde, as it may interfere with other common chemistries such as
anti-foams, oxygen scavengers, flocculants, and other oxidizing biocides (e.g. chlorite). Successive addition of
different chemical packages may be necessary to prevent cross reactivity and to optimize performance. When a
deaerator is present and treated with chlorite or a similar oxidizing chemistry, glutaraldehyde is typically dosed
after the deaerator.
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OJ L, 30.9.2025
Dose 50 to 1 000 g glutaraldehyde per m3injection water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.16.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water. This
concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test to determine
the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.16.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.16.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.16.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.17. Use description
Table 17
Slimicide treatment in hydro-testing fluids and mothballing fluids in the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in hydro-testing fluids and mothballing fluids
in the oil and gas industry.
Application method(s) Method: closed system
Detailed description:
Continuous injection into the water stream during the pipeline
filling operation using chemical injection skids equipped with
injection pumps.
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Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3hydro-testing fluid or
mothballing fluid, depending on the water quality and required
residence time within the equipment.
Number and timing of application:
There is no additional biocide injection into the hydro-testing fluid
once the filling operation is completed.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.17.1. Use-specific instructions for use
Dose 50 to 1 000 g glutaraldehyde per m3 of hydro-testing fluid or mothballing fluid, depending on the water
quality and required residence time within the equipment.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.17.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the hydrotesting and mothballing
fluids. This concentration can be achieved either by slow release and/or long retention times resulting in
degradation of glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at
least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Hydrotest and mothballing water containing up to 750 mg/L glutaraldehyde after the pressure test can be used for
re-injection. Run lab test to determine the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
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4.17.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.17.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.17.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.18. Use description
Table 18
Slimicide treatment in water-based fracturing fluids for the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in water-based fracturing fluids for the oil and
gas industry (i.e. shale gas extraction, wet shale extraction, shale
oil extraction, production from tight gas reservoirs, production of
coal bed methane and fracturing in conventional reservoirs).
Application method(s) Method: closed system
Detailed description:
Dosing using automated pumps directly into pipelines or prepared
in a mixing tank before in-line application.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3fracturing fluid, in the
hydraulic fracturing water matrix.
Number and timing of application:
In the hydraulic fracturing industry the application of the biocidal
product is typically a single injection, which happens during the
actual fracturing. A new biocide addition is only done when the
well is re-fractured. Refracturing is rare but can be performed up
to 20 times during the lifetime of a well. The lifetime of a well can
reach up to 20 years.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
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— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.18.1. Use-specific instructions for use
Glutaraldehyde is typically applied through a closed system to a mixing tank using a pump Glutaraldehyde may be
used in combination with other chemistries such as friction reducers, gelling agents, proppants, and corrosion
inhibitors, and applied together with these chemistries in the mixing tank(s). If used for intermittent treatments
during operations, a stream of glutaraldehyde will be directly dosed into the process water stream from a separate
tank into a closed system, thereby significantly reducing the chance of exposure.
Dose 50 to 1 000 g glutaraldehyde per m3fracturing fluid, in the hydraulic fracturing water matrix.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.18.2. Use-specific risk mitigation measures
Preserved fracturing fluids are reused where applicable. If discharged into seawater 0,2 mg glutaraldehyde/L
fracturing fluid must not be exceeded. This concentration can be achieved either by slow release and/or long
retention times resulting in degradation of glutaraldehyde and/or by dilution and/or by addition of sodium
bisulphite at pH 5 (release after at least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at
least 10-16 hours) as degradation aids. Run lab test to determine the soiling dependent dosage and degradation
rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.18.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
In addition:
Conditions preventing emissions to water:
Emissions to surface water are prevented through the design of the installation. By way of example spills, leaks and
cleaning solutions may be drained to a lined storage area, preventing release to surface water. Sub-surface releases
of fluid during the fracturing process are prevented from reaching aquifers through the presence of relatively
impermeable formations above the target formation. This limits upward migration of fluid. This is also relevant
for recovered fluids that are re-injected for use or disposal. A minimum vertical separation distance between the
target formation and aquifer should be respected. National legislation may also require a minimum depth
Recovered water may finally be discharged via one or more large-scale waste water treatment plants where a
combination of physical and biological treatments will reduce emissions to the receiving water.
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Conditions preventing emissions to soil:
Emissions, through downward migration are prevented through the design of the installation. By way of example
spills, leaks and cleaning solutions may be prevented from downward migration to soil by the employment of a
non-permeable membrane below the well pad. Sludge from treatment works should not be spread on land.
Existence of standard municipal sewage treatment plant
Waste contractors employed to dispose of recovered water, may do so via a waste water treatment plant,
depending on the properties of the water and conditions of local regulations.
4.18.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
Additional:
Contaminated water arising from cleaning will be collected and removed for disposal according to EU and local
regulations and conditions.
Waste product remaining in containers after use will be returned, in the containers, to the supplier for cleaning/
refilling.
Waste sludge from treatment works will be handled as industrial waste and not spread on land.
4.18.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.19. Use description
Table 19
Slimicide treatment in produced water for recycling in the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in produced water for recycling in the oil and
gas industry.
Application method(s) Method: closed system
Detailed description:
Dosing using pumps directly into the water stream before being
mixed with fresh injection water and pumped into the petroleum
reservoir.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3produced water.
Number and timing of application:
Batch treatment: Batches may occur up to three times per week in
severe cases, but typically occur once per week.
Continuous treatment: biocide is supplied in a continuous fashion
during operations.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 37/121EN
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Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.19.1. Use-specific instructions for use
Dose 50 to 1 000 g glutaraldehyde per m3produced water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.19.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water for recycling.
This concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water for recycling containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test
to determine the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.19.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.19.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.19.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
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OJ L, 30.9.2025
5. GENERAL DIRECTIONS FOR USE OF THE META SPC 1
5.1. Instructions for use
See use specific instructions for use.
5.2. Risk mitigation measures
Disconnecting the product container manually:
The use of eye protection (chemical goggles) consistent with EN 166 or equivalent during handling of the product
is mandatory.
Wear a protective coverall [type 3or type 4] consistent with EN 14605 or equivalent.
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
Use of respiratory protective equipment (RPE) providing a protection factor of 40 is mandatory. Providing at least
a powered air purifying respirator with helmet/hood/mask (TH3 (EN 12941 or equivalent)/TM3 (EN 12942 or
equivalent )), or a full-face mask (EN 136 or equivalent) with particle filter P3 (EN 12083 or equivalent).
During tank cleaning & maintenance:
Wear a protective coverall [type 3or type 4] consistent with EN 14605 or equivalent.
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
Use of respiratory protective equipment (RPE) providing a protection factor of 10 is mandatory. Providing at least
a powered air purifying respirator with helmet/hood/mask (TH1 (EN 12941 or equivalent)/TM1 (EN 12942 or
equivalent )), a half/quarter mask (EN 140 or equivalent) or a full-face mask (EN 136 or equivalent) with particle
filter P2 (EN 12083 or equivalent) each or a filtering half mask (FFP2, EN 149 or equivalent).
Draining, cleaning and maintenance of closed re-circulating system:
Wear a protective coverall [type 3or type 4] consistent with EN 14605 or equivalent.
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or
equivalent during product handling phase (glove material to be specified by the authorisation holder within the
product information).
Loading/unloading slurry tanks:
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
The product must be poured using an automated dosing system.
Ensure that application is carried out in well-ventilated areas.
Use engineering controls to maintain airborne level below exposure limit requirements or guidelines.
Use an approved air-purifying or positive-pressure supplied-air respirator depending on the potential airborne
concentration.
Regarding the personal protective equipment listed in this section, this is without prejudice to the application by
employers of Council Directive 98/24/EC and other Union legislation in the area of health and safety at work.
See section 6 for the full references to this act and the European Standards.
5.3. Particulars of likely direct or indirect effects, first aid instructions and emergency measures to protect
the environment
IF INHALED: Move to fresh air and keep at rest in a position comfortable for breathing.
If symptoms: Immediately call 112/ambulance for medical assistance.
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IF SWALLOWED: If conscious, immediately rinse mouth. Give something to drink, if exposed person is able to
swallow. Do NOT induce vomiting. Call 112/ambulance for medical assistance.
IF ON SKIN: Immediately wash skin with plenty of water. Thereafter take off all contaminated clothing and wash it
before reuse. Continue to wash the skin with water for 15 minutes. Call a POISON CENTRE or a doctor. If skin
irritation or rash occur: Get medical advice.
IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing for at least 15 minutes. Call 112/ambulance for medical assistance.
Information to Healthcare personnel/doctor:
Immediately initiate life support measures, thereafter call a POISON CENTRE.
Environmental precautions: Prevent from entering into soil, ditches, sewers, waterways and/or groundwater.
Spills or discharge to natural waterways is likely to kill aquatic organisms.
Personal precautions, protective equipment and emergency procedures in case of accidental release
measures:Evacuate area. Keep upwind of spill. Ventilate area of leak or spill. Only trained and properly protected
personnel must be involved in clean-up operations. Use appropriate safety equipment.
Methods and materials for containment and cleaning up: Avoid making contact with spilled material, since
glutaraldehyde will be absorbed by most shoes. When cleaning up a spill always wear the appropriate protective
equipment, including respiratory protection, gloves, protective clothing and eye protection. A self-contained
breathing apparatus or respirator and absorbents may be necessary, depending on the size of the spill and the
adequacy of ventilation.
Small spills: Wear the correct protective equipment including gloves and protective clothing and cover the liquid
with absorbent material. Collect and seal the material and the dirt that has absorbed the spilled material in
polyethylene bags and place in a drum for transit to an approved disposal site. Rinse away the remaining spilled
material with water to reduce odour, and discharge the rinsate into a municipal or industrial sewer, not into a
natural waterway.
Large spills: In case of nasal and respiratory irritation, vacate the room immediately. Personnel cleaning up should
be trained and equipped with a self-contained breathing apparatus, or an officially approved or certified full-face
respirator equipped with an organic vapor cartridge, glove, and clothing impervious to glutaraldehyde, including
rubber boots or shoe protection. Deactivate with sodium bisulfite (2-3 parts (by weight) per part of
glutaraldehyde), collect the neutralized liquid and place in a drum for transit to an approved disposal site.
5.4. Instructions for safe disposal of the product and its packaging
The biocidal product, when being disposed of in its unused and uncontaminated state should be treated as a
hazardous waste according to EC Directive 2008/98/EC.
Deactivate with sodium bisulfite (2-3 parts (by weight) per part of glutaraldehyde), collect the neutralized liquid
and place in a drum for transit to an approved disposal site. If the concentration of glutaraldehyde is up to 2%,
deactivate by the addition of aqueous sodium hydroxide solution in an amount sufficient to maintain a pH of 12
for 8 h, followed by neutralization (i.e. neutral pH) with the careful addition of an inorganic acid e.g. hydrochloric
acid, before disposal by appropriate means. Any disposal practices must be in compliance with all national and
provincial laws and any municipal or local by-laws governing hazardous waste. Do not dump into any sewers, on
the ground, or into any body of water. Avoid release to the environment. High-temperature incineration is an
acceptable practice glutaraldehyde burns cleanly to carbon dioxide and water.
Containers used to store glutaraldehyde solutions are non refillable. Do not reuse or refill the containers.
Containers should be triple or pressure rinsed with water promptly after they are emptied. They can then be
offered for recycling or reconditioning for biocidal products, or they can be punctured and disposed of in a
sanitary landfill or by other procedures approved by national and local authorities. Send waste liquid from rinsing
of used containers to an approved waste handling facility.
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5.5. Conditions of storage and shelf-life of the product under normal conditions of storage
Do not store in and avoid contact with aluminum, carbon steel, copper, mild steel, iron. Avoid contact with
amines, ammonia, strong acids, strong bases, strong oxidizers.
Store at temperatures <40 °C
Shelf life:
metaSPC GA 50: 12 months in HDPE and stainless steel
6. OTHER INFORMATION
The full titles of the EN standards referenced in the Risk mitigation measures are:
EN ISO 374 – Protective gloves against dangerous chemicals and micro-organisms
EN 166 – Eye protection against chemicals.
EN 14605 – Protective clothing against liquid chemicals – Performance requirements for clothing with liquid-tight
(Type 3) or spray-tight (Type 4) connections, including items providing protection to parts of the body only (Types
PB [3] and PB [4]).
EN 12941 - Respiratory protective devices - Powered filtering devices incorporating a loose fitting respiratory
interface - Requirements, testing, marking
EN 12942 – Respiratory protective devices - Powered filtering devices incorporating full face masks, half masks or
quarter masks - Requirements, testing, marking
EN 136 - Respiratory protective devices. Full face masks. Requirements, testing, marking
EN 140 - Respiratory protective devices - Half masks and quarter masks - Requirements, testing, marking
EN 149 - Respiratory protective devices - Filtering half masks to protect against particles - Requirements, testing,
marking
EN 12083 - Respiratory protective devices – Filters with breathing hoses, (Non-mask mounted filters) – Particle
filters, gas filters, and combined filters – Requirements, testing, marking
Council Directive 98/24/EC of 7 April 1998 on the protection of the health and safety of workers from the risks
related to chemical agents at work (fourteenth individual Directive within the meaning of Article 16(1) of
Directive 89/391/EEC) (OJ L 131, 5.5.1998, p. 11).
With respect to the “Category (ies) of users” note: “Professionals (including industrial users) means trained
professionals if this is required by national legislation.
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7. THIRD INFORMATION LEVEL: INDIVIDUAL PRODUCTS IN THE META SPC 1
7.1. Trade name(s), authorisation number and specific composition of each individual product
Trade name(s) BCI Market area: EU
D91150A
Isigard® Market area: EU
GA 50
AQU Market area: EU
CAR(TM)
GA 50
Water
Treatment
Microbio
cide
Preventol® Market area: EU
GA 50
UCARCI Market area: EU
DE(TM) 50
Antimicro
bial
ACTICIDE® Market area: EU
GDA 50
aqualead® Market area: EU
BC GA 50
Bactron Market area: EU
B1150
Bansan 500 Market area: EU
Beaumont Market area: EU
C 412
TT-TC
BIO Market area: EU
C11150A
SANIPOL® Market area: EU
PG 50
Busan 1202 Market area: EU
Butrol 1202 Market area: EU
CHIMEC Market area: EU
1020
FennoCide Market area: EU
GL50
FennoSan Market area: EU
GL10
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GABOTEC Market area: EU
G 50% B
GABOTEC Market area: EU
G 50% B6
GLUT- Market area: EU
ACTIVE 50
IOB
GLUT- Market area: EU
ACTIVE
50-A IOB
GLUT- Market area: EU
ACTIVE
50-B IOB
Kurita® Market area: EU
F-4750
MB-5028 Market area: EU
MB-544C Market area: EU
Nalco Market area: EU
EC6202A
OS Glutabio Market area: EU
PROSOLV Market area: EU
BI8815
PROSOLV Market area: EU
BI8815DW
SPECTRUS Market area: EU
NX1165
Authorisation number EU-0030162-0001 1-1
Common name IUPAC name Function CAS number EC number Content (%)
Glutaraldehyde 1,5-pentanedial Active substance 111-30-8 203-856-5 50,5 % (w/
w)
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1. META SPC 2 ADMINISTRATIVE INFORMATION
1.1. Meta SPC 2 identifier
Identifier Meta SPC: meta SPC GA 24
1.2. Suffix to the authorisation number
Number 1-2
1.3. Product type(s)
Product type(s) PT06: Preservatives for products during storage
PT11: Preservatives for liquid-cooling and processing
systems
PT12: Slimicides
2. META SPC 2 COMPOSITION
2.1. Qualitative and quantitative information on the composition of the meta SPC 2
Common name IUPAC name Function CAS number EC number Content (%)
Glutaraldehyde 1,5-pentane Active 111-30-8 203-856-5 23,4 - 25,9 % (w/w)
dial substance
2.2. Type(s) of formulation of the meta SPC 2
Formulation type(s) AL Any other liquid
3. HAZARD AND PRECAUTIONARY STATEMENTS OF THE META SPC 2
Hazard statements H302: Harmful if swallowed.
H314: Causes severe skin burns and eye damage.
H317: May cause an allergic skin reaction.
H331: Toxic if inhaled.
H334: May cause allergy or asthma symptoms or
breathing difficulties if inhaled.
H412: Harmful to aquatic life with long lasting effects.
EUH071: Corrosive to the respiratory tract.
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Precautionary statements P260: Do not breathe spray.
P271: Use only outdoors or in a well-ventilated area.
P280: Wear protective gloves.
P273: Avoid release to the environment.
P284: [In case of inadequate ventilation] wear
respiratory protection.
P301+P310: IF SWALLOWED: Immediately call a
POISON CENTER.
P303+P361+P353: IF ON SKIN (or hair): Take off
immediately all contaminated clothing. Rinse skin with
water [or shower].
P304+P340: IF INHALED: Remove person to fresh air
and keep comfortable for breathing.
P310: Immediately call a POISON CENTER.
P305+P351+P338: IF IN EYES: Rinse cautiously with
water for several minutes. Remove contact lenses, if
present and easy to do. Continue rinsing.
P342+P311: If experiencing respiratory symptoms:
Call a POISON CENTER.
P403+P233: Store in a well-ventilated place. Keep
container tightly closed.
P501: Dispose of contents to a hazardous waste
disposal service in accordance with the statutory
regulations.
P501: Dispose of container to a hazardous waste
disposal service in accordance with the statutory
regulations.
4. AUTHORISED USE(S) OF THE META SPC
4.1. Use description
Table 1
Short-term preservation of the industrial process, i.e. preservation during the production and/or storage
of latexes (one week) and waterborne paints (three weeks) in the plant prior to final packaging
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
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Field(s) of use Indoor use
Short-term efficacy to maintain plant hygiene and prevent
intermediate production mixtures of latexes and water-borne
paints from spoiling.
Application method(s) Method: closed system
Detailed description:
The biocidal products are stored either in a single large tank or in
several tanks, and dosed into raw materials or intermediate
mixtures during the production process.
Dose the biocidal product to the end use fluid at a point to ensure
adequate mixing using automated or manual metering.
Application rate(s) and frequency Application Rate:
Paints: 0,1 to 0,95 g glutaraldehyde per kg of matrix for
preventive use. Paints: 0,1 to 0,95 g glutaraldehyde per kg of
matrix with a contact time of 7 days for curative use. Latexes: 0,1
to 0,6 g glutaraldehyde per kg of matrix for preventive use.
Latexes: 0,1 to 0,6 g glutaraldehyde per kg of matrix with a
contact time of 7 days for curative use.
Number and timing of application:
Once per production run of the product to preserve.
Glutaraldehyde provides immediate efficacy and short-term
preservation up to three weeks for paints and one week for latexes.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.1.1. Use-specific instructions for use
Dose the biocidal product to the end use fluid at a point to ensure adequate mixing, using automated or manual
metering.
Paints: 0,1 to 0,95 g glutaraldehyde per kg of matrix.
Latexes: 0,1 to 0,6 g glutaraldehyde per kg of matrix.
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The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.1.2. Use-specific risk mitigation measures
The product must not be added to paints and coatings which are applied by spraying.
See also the general directions for use.
4.1.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.1.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.1.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.2. Use description
Table 2
Preservation of washing and cleaning fluids
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Preservation of washing and cleaning fluids (i.e. hard surface
cleaners (all-purpose cleaners), hand dish washing products, fabric
softeners and laundry detergents).
Application method(s) Method: closed system
Detailed description:
Dose the biocidal product to the end use fluid at a point to ensure
adequate mixing using automated or manual metering.
Application rate(s) and frequency Application Rate:
0,3 to 0,95 g glutaraldehyde per 1 kg of the final product for
preventive use against bacteria.
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0,2 to 0,95 g glutaraldehyde per 1 kg of the final product for
preventive use against yeasts and fungi.
0,3 to 0,95 g glutaraldehyde per 1 kg of the final product with a
contact time of 7 days for curative use against bacteria.
0,2 to 0,95 g glutaraldehyde per 1 kg of the final product with a
contact time of 7 days for curative use against yeasts and fungi.
Number and timing of application:
Once per production run of the product to preserve.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.2.1. Use-specific instructions for use
Dose the biocidal product to the end use fluid at a point to ensure adequate mixing using automated or manual
metering.
Dose:
Bacteria: 0,3 to 0,95 g glutaraldehyde per 1 kg of the final product.
Yeasts & Fungi: 0,2 to 0,95 g glutaraldehyde per 1 kg of the final product.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.2.2. Use-specific risk mitigation measures
See general directions for use.
4.2.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.2.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
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4.2.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.3. Use description
Table 3
Preservation of pigment pastes/mineral slurries to colour a wide variety of products (e.g. textiles, inks,
paints, paper)
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Indoor use
Pigment pastes and mineral slurries used to colour a wide variety
of products (e.g. textiles (carpet fibres, carpet backing, canvas,
cordage, drapes and shower curtains), inks, paints, paper).
Application method(s) Method: closed system
Detailed description:
Good mixing and uniform distribution of the biocidal product
should be ensured using automated or manual metering. Pigment
pastes are readily incorporated by low energy mixing equipment
requiring no additional dispersion.
Application rate(s) and frequency Application Rate:
0,25 to 0,5 g glutaraldehyde per kg of the pigment paste/mineral
slurry for preventive use. 0,25 to 0,5 g glutaraldehyde per kg of
the pigment paste/mineral slurry with a contact time of 2 days for
curative use.
Number and timing of application:
Once per production run of the product to preserve.
Glutaraldehyde provides immediate efficacy and prevents
re-growth for a period up to 3 weeks.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
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— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.3.1. Use-specific instructions for use
Dose the biocidal product to the pigment paste or mineral slurry at a point to ensure adequate mixing using
automated or manual metering.
Dose 0,25 to 0,5 g glutaraldehyde per kg of the pigment paste/mineral slurry.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.3.2. Use-specific risk mitigation measures
See general directions for use.
4.3.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.3.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.3.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.4. Use description
Table 4
Preservation of additives for the production of paper
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Preservation of paper additives used in paper mills.
Application method(s) Method: closed system
Detailed description:
The biocidal product is automatically added by means of a dosing
pump and dedicated feeding lines in the additives tank.
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Application rate(s) and frequency Application Rate:
For bacteria, 0,1 to 0,5 g glutaraldehyde per kg of the paper
additive for preventive use. For yeasts and fungi, 0,25 to 0,5 g
glutaraldehyde per kg of the paper additive for preventive use. For
bacteria, 0,1 to 0,5 g glutaraldehyde per kg of the paper additive
with a contact time of 2 days for curative use. For yeasts and fungi,
0,25 to 0,5 g glutaraldehyde per kg of the paper additive with a
contact time of 2 days for curative use.
Number and timing of application:
Once per production run of the product to preserve.
Glutaraldehyde provides immediate efficacy and prevents
re-growth for a period up to 3 weeks.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.4.1. Use-specific instructions for use
Dose the biocidal product to the paper additive at a point to ensure adequate mixing using automated or manual
metering.
For bacteria, 0,1 to 0,5 g glutaraldehyde per kg of the paper additive.
For yeasts and fungi, 0,25 to 0,5 g glutaraldehyde per kg of the paper additive.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.4.2. Use-specific risk mitigation measures
See general directions for use.
4.4.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.4.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
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4.4.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.5. Use description
Table 5
Preservation of crude oil
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of crude oil with associated water in preparation for
further processing.
Application method(s) Method: closed system
Detailed description:
Batch injection via dosing pump and dedicated feed lines in stored
volume of fuels.
Application rate(s) and frequency Application Rate:
0,025 to 0,4 g glutaraldehyde per liter of water content in crude
oil for preventive use. 0,025 to 0,4 g glutaraldehyde per liter of
water content in crude oil with a contact time of 24 hours for
curative use.
Number and timing of application:
Once per week.
Glutaraldehyde provides immediate efficacy and short-term
preservation up to one week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
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4.5.1. Use-specific instructions for use
Crude tanks being treated should be at least 10% full before treatment. Do not dispense into empty crude tanks.
Use the biocidal product in accordance with local regulatory requirements, and do not exceed recommended dose
levels. When treating storage tanks, please note that effective treatment will only be achieved with efficient mixing.
Ideally, the biocidal product should be dosed into a flowing crude oil stream in the storage tank inlet.
Other methods of application, such as dumping, will not affect the performance of the biocidal product, but might
extend the treatment time required.
Dose 0,025 to 0,4 g glutaraldehyde per liter of water content in crude oil.
Dose level should be proportional to the risk and level of infection, and anticipated time before the next treatment
or fluid discharge. Dosing system should be a closed system. Adequate agitation is required to ensure homogeneity
throughout the fluid volume.
The dose and frequency strongly depend on the formulation and intended use of the matrix (crude oil) to which
the preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system
to be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.5.2. Use-specific risk mitigation measures
See general directions for use.
Additionally:
In case of direct release of the aqueous phase to the sewer the concentration shall not exceed
0,75 mg glutaraldehyde/L.
4.5.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.5.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
Associated water should be disposed of according to all local and regional regulations.
See general directions for use.
4.5.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.6. Use description
Table 6
Preservation of drilling fluids in the oil and gas industry
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of fluids, (e.g., drill muds, cementing fluids, spacer
fluids) used in the drilling of oil, gas and water wells.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 53/121EN
OJ L, 30.9.2025
Application method(s) Method: closed system
Detailed description:
Periodical injection directly into prepared drilling fluids.
Application rate(s) and frequency Application Rate:
0,25 to 0,5 g glutaraldehyde per liter of drilling fluid with a
contact time of 1 hour for curative use.
Number and timing of application:
Treatment is required when there is evidence, or a very high
likelihood, of microbial degradation of drilling fluids. Treatment
can be repeated as often as required, based on monitoring of
microbial populations and biocide concentration. Resurgent and
robust microbial populations should be treated at most 3 times
per week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.6.1. Use-specific instructions for use
Dose 0,25 to 0,5 g glutaraldehyde per liter of drilling fluid.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
Ensure that treated material is separated from other muds after use. Used drilling fluids must be injected directly
into the formation, collected for reuse in a separate, closed container, or disposed of properly according to local,
state, or federal requirements as described in the SDS. It is not allowed to discharge used drilling fluids overboard.
4.6.2. Use-specific risk mitigation measures
Preserved materials must be recycled or disposed of as solid waste.
See general directions for use.
4.6.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
54/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.6.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.6.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.7. Use description
Table 7
Preservation of fracturing fluids during storage in the oil and gas industry
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of fluids used in the fracturing process.
Application method(s) Method: closed system
Detailed description:
Injection directly into prepared fracturing fluids.
Application rate(s) and frequency Application Rate:
0,25 to 0,5 g glutaraldehyde per liter of fracturing fluid for
preventive use. 0,25 to 0,5 g glutaraldehyde per liter of fracturing
fluid with a contact time of 1 hour for curative use.
Number and timing of application:
Treatment is required when there is evidence, or a very high
likelihood, of microbial degradation of fracturing fluids. Treatment
can be repeated as often as required, based on monitoring of
microbial populations and biocide concentration. Resurgent and
robust microbial populations should be treated at most 3 times
per week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 55/121EN
OJ L, 30.9.2025
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.7.1. Use-specific instructions for use
Dose 0,25 to 0,5 g glutaraldehyde per liter of fracturing fluid.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.7.2. Use-specific risk mitigation measures
See general directions for use.
4.7.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.7.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
Additional:
Contaminated water arising from cleaning will be collected and removed for disposal according to EU and local
regulations and conditions.
Waste product remaining in containers after use will be returned, in the containers, to the supplier for cleaning/
refilling.
Waste sludge from treatment works will be handled as industrial waste and not spread on land.
4.7.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.8. Use description
Table 8
Preservation of liquids used in closed re-circulating cooling systems
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Indoor use
Outdoor use
Liquid-closed re-circulating cooling/heating and processing
systems.
56/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
Application method(s) Method: closed system
Detailed description:
Dosing into the cooling system.
Application rate(s) and frequency Application Rate:
25 to 200 g glutaraldehyde per m3of water.
Number and timing of application:
Bi- or tri- monthly according to the characteristics of the system
and the stability of the biocidal product in the treated water.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.8.1. Use-specific instructions for use
It is recommended to mechanically cleanse dirty systems with fresh water before starting the treatment with the
biocidal product.
Dose in a well-mixed point of the circuit, below the water level. When opening the system for servicing or
maintenance, biocide can be added to reach the initial dosing concentrations.
System monitor
Control the level of biocide with a test kit at least every 3 months and prior to shut off period of the system.
Control microbial contamination with dip slides or other appropriate techniques at least every 3 months
Particular attention should be addressed during the shut off period of the system where stagnant fluids are more
susceptible to microbial contamination.
Dose 25 to 200 g glutaraldehyde per m3of water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.8.2. Use-specific risk mitigation measures
Drain off preserved cooling fluids at least five days after the last addition of the biocidal product.
See also the general directions for use.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 57/121EN
OJ L, 30.9.2025
4.8.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.8.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.8.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.9. Use description
Table 9
Preservation of liquids used in open re-circulating cooling systems
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: green algae
Development stage: no data
Field(s) of use Outdoor use
Liquid-open re-circulating cooling and processing systems.
Application method(s) Method: open system
Detailed description:
Glutaraldehyde is automatically added in the water circuit, usually
as upstream as possible, by means of injection by a dosing pump
and dedicated feeding lines. A timer is used for intermittent
dosage.
Application rate(s) and frequency Application Rate:
25 to 50 g glutaraldehyde per m3of water
Number and timing of application:
Typical dose : 1-2 days
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
58/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.9.1. Use-specific instructions for use
For control of microbial growth in industrial cooling water systems treated with a biocidal product by slug dosing.
Not intended for use in once-through cooling systems.
It is recommended to mechanically cleanse dirty systems before starting the treatment with the biocidal product.
Dose in a well-mixed point of the circuit, below the water level.
Typical dose : 1-2 days. Each slug dose lasts 15-30 minutes, depending on the pump capacity and the volume of
water in the circuit. Treatment shall not exceed 2 days.
Dose 25 to 50 g glutaraldehyde per m3of water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.9.2. Use-specific risk mitigation measures
The use is restricted to small cooling systems with a maximum blowdown of 2 m3/h. Waste water must be
discharged to the municipal sewer, purified in an on-site industrial sewage treatment plant including a biological
treatment step, or directly to surface water via a settling pond that allows sufficient retention.
4.9.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.9.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.9.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 59/121EN
OJ L, 30.9.2025
4.10. Use description
Table 10
Preservation of injection water in the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of injection water in the oil and gas industry.
Application method(s) Method: closed system
Detailed description:
The biocidal product is dosed using automated pumps directly
into the water stream, after mixing of production water and
make-up water into the petroleum reservoir.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
injection water with a contact time of 24 hours. Anaerobic
bacteria: preventive, use 150 to 1 000 g glutaraldehyde per m3of
injection water.
Number and timing of application:
The biocidal product is typically dosed in a weekly batch fashion,
ranging from one to five hours per dose. Batches may occur up to
three times per week in severe cases.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
60/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.10.1. Use-specific instructions for use
Glutaraldehyde should be dosed separately from other oil field chemistries such as antifoaming agents, oxygen
scavengers, flocculants, or other oxidizing biocides (e.g. chlorite) in order to prevent cross reactivity. Successive
addition may therefore be required to optimize performance. If a deaerator is being treated with oxidizing
biocides, glutaraldehyde should be dosed downstream of the deaeration unit.
Dose 50 to 1 000 g glutaraldehyde per m3of injection water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.10.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water. This
concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test to determine
the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.10.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.10.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.10.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.11. Use description
Table 11
Preservation of hydro-testing fluids and mothballing fluids in the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of hydro-testing fluids and mothballing fluids in the
oil and gas industry.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 61/121EN
OJ L, 30.9.2025
Application method(s) Method: closed system
Detailed description:
Continuous injection into the water stream during the pipeline
filling operation using chemical injection skids equipped with
injection pumps.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
hydro-testing fluid or mothballing fluid with a contact time of 24
hours, depending on the water quality. Anaerobic bacteria:
preventive use, 150 to 1 000 g glutaraldehyde per m3of hydro-
testing fluid or mothballing fluid, depending on the water quality
and required residence time within the equipment.
Number and timing of application:
There is no additional biocide injection into the hydro-testing fluid
once the filling operation is completed.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.11.1. Use-specific instructions for use
Dose 50 to 1 000 g glutaraldehyde per m3 of hydro-testing fluid or mothballing fluid, depending on the water
quality and required residence time within the equipment.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
62/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.11.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the hydrotesting and mothballing
fluids. This concentration can be achieved either by slow release and/or long retention times resulting in
degradation of glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at
least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Hydrotest and mothballing water containing up to 750 mg/L glutaraldehyde after the pressure test can be used for
re-injection. Run lab test to determine the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.11.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.11.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.11.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.12. Use description
Table 12
Preservation of water-based fracturing fluids for the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of water-based fracturing fluids for the oil and gas
industry (i.e. shale gas extraction, wet shale extraction, shale oil
extraction, production from tight gas reservoirs, production of
coal bed methane and fracturing in conventional reservoirs).
Application method(s) Method: closed system
Detailed description:
Glutaraldehyde is typically applied in a mixing tank, as it cannot
be exposed to open systems such as the hydraulic fracturing pond
or other open water sources that make up the hydraulic fracturing
pond water. Glutaraldehyde is applied to the mixing tank using
automated pumps, together with other chemicals such as but not
limited to friction reducers, gelling agents, proppants (sand in case
of slick water), corrosion inhibitors.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 63/121EN
OJ L, 30.9.2025
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
fracturing fluid with a contact time of 24 hours. Anaerobic
bacteria: preventive use, 150 to 1 000 g glutaraldehyde per m3of
fracturing fluid.
Number and timing of application:
In the hydraulic fracturing industry the application of the biocidal
product is typically a single injection, which happens during the
actual fracturing. A new biocide addition is only done when the
well is re-fractured. Refracturing is rare but can be performed up
to 20 times during the lifetime of a well. The lifetime of a well can
reach up to 20 years.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.12.1. Use-specific instructions for use
Typically applied through a closed system to a mixing tank using a pump. Glutaraldehyde may be used in
combination with other chemistries such as friction reducers, gelling agents, proppants, and corrosion inhibitors,
and applied together with these chemistries in the mixing tank(s). If used for intermittent treatments during
operations, a stream of glutaraldehyde will be directly dosed into the process water stream from a separate tank
into a closed system, thereby significantly reducing the chance of exposure.
Dose 50 to 1 000 g glutaraldehyde per m3of fracturing fluid.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.12.2. Use-specific risk mitigation measures
Preserved fracturing fluids are reused where applicable. If discharged into seawater 0,2 mg glutaraldehyde/L
fracturing fluid must not be exceeded. This concentration can be achieved either by slow release and/or long
retention times resulting in degradation of glutaraldehyde and/or by dilution and/or by addition of sodium
bisulphite at pH 5 (release after at least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at
least 10-16 hours) as degradation aids. Run lab test to determine the soiling dependent dosage and degradation
rate in use.
64/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.12.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use. In addition:
Conditions preventing emissions to water:
Emissions to surface water are prevented through the design of the installation. By way of example spills, leaks and
cleaning solutions may be drained to a lined storage area, preventing release to surface water. Sub-surface releases
of fluid during the fracturing process are prevented from reaching aquifers through the presence of relatively
impermeable formations above the target formation. This limits upward migration of fluid. This is also relevant
for recovered fluids that are re-injected for use or disposal. A minimum vertical separation distance between the
target formation and aquifer should be respected. National legislation may also require a minimum depth.
Recovered water may finally be discharged via one or more large-scale waste water treatment plants where a
combination of physical and biological treatments will reduce emissions to the receiving water.
Conditions preventing emissions to soil:
Emissions, through downward migration are prevented through the design of the installation. By way of example
spills, leaks and cleaning solutions may be prevented from downward migration to soil by the employment of a
non-permeable membrane below the well pad. Sludge from treatment works should not be spread on land.
Existence of standard municipal sewage treatment plant
Waste contractors employed to dispose of recovered water, may do so via a waste water treatment plant,
depending on the properties of the water and conditions of local regulations.
4.12.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use. Additional:
Contaminated water arising from cleaning will be collected and removed for disposal according to EU and local
regulations and conditions.
Waste product remaining in containers after use will be returned, in the containers, to the supplier for cleaning/
refilling.
Waste sludge from treatment works will be handled as industrial waste and not spread on land.
4.12.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.13. Use description
Table 13
Preservation of produced water for recycling in the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 65/121EN
OJ L, 30.9.2025
Field(s) of use Outdoor use
Preservation of produced water for recycling in the oil and gas
extraction industry.
Application method(s) Method: closed system
Detailed description:
Dosing using pumps directly into the water stream before being
mixed with fresh injection water and pumped into the petroleum
reservoir.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
produced water with a contact time of 24 hours. Anaerobic
bacteria: preventive use, 150 to 1 000 g glutaraldehyde per m3of
produced water.
Number and timing of application:
Batch treatment: The biocidal product is typically dosed in a
weekly batch fashion, ranging from one to five hours per dose.
Batches may occur up to three times per week in severe cases, but
typically occur once per week.
Continuous treatment: biocide is supplied in a continuous fashion
during operations.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.13.1. Use-specific instructions for use
Dose for the preservation of produced water before re-use 50 to 1 000 g glutaraldehyde per m3of produced water.
This can be done batch wise or continuously.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
66/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.13.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water. This
concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test to determine
the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.13.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.13.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.13.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.14. Use description
Table 14
Slimicide treatment in the wet-end stage of the pulp and paper manufacturing process
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Slimicide treatment in the wet-end stage of the pulp and paper
manufacturing process.
Application method(s) Method: closed system
Detailed description:
Automatic dosing by a pump and fixed pipes into the primary
circuit, usually in the collection sump or in the headbox.
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Application rate(s) and frequency Application Rate:
Initial dose (wet-end defouling treatment): 250 g glutaraldehyde
per ton paper pulp. Wet-end maintenance dose: 100 g
glutaraldehyde per ton paper pulp.
Number and timing of application:
Initial dose (Wet end de-fouling treatment): 2-6 automatic slug (=
shock) dose additions/day. Repeat 1 to 3 days until control is
achieved.
Wet-end maintenance dose: 2-6 automatic slug dose additions/day,
as necessary to maintain control.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.14.1. Use-specific instructions for use
Dose in a well-mixed point of the primary circuit, below the water level. Heavily fouled systems should be boiled
out prior to initial treatment.
Each slug dose lasts 15-30 minutes.
Initial dose (wet-end defouling treatment): 250 g glutaraldehyde per ton paper pulp.
Wet-end maintenance dose: 100 g glutaraldehyde per ton of paper pulp.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.14.2. Use-specific risk mitigation measures
Application is only allowed in paper factories that comply with the Industrial Emission Directive 2010/75/EU
where wastewater is purified in an on-site industrial sewage treatment plant including a biological treatment step
in accordance to the Best Available Techniques (BAT) as prescribed in the BAT-reference document (BREF) for the
production of pulp, paper and board. The effluent must be diluted at least 200 times. Paper factories that are
exempted from the Industrial Emission Directive must discharge to the municipal sewer.
4.14.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
68/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.14.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.14.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.15. Use description
Table 15
Slimicide treatment in the de-inking process of the pulp and paper
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Slimicide treatment in the de-inking process of the pulp and
paper.
Application method(s) Method: closed system
Detailed description:
Automatic dosing by pump and fixed pipes into the circuit, usually
in the pulper.
Application rate(s) and frequency Application Rate:
Initial dose (de-fouling treatment): 250 g glutaraldehyde per ton
paper pulp. Maintenance dose: 100 g glutaraldehyde per ton paper
pulp.
Number and timing of application:
Initial dose (de-fouling treatment): 1-2 automatic slug (= shock)
dose additions/day. Repeat for 1 to 2 days until control is achieved.
Maintenance dose: 1-2 automatic slug dose additions/day, as
necessary to maintain control.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 69/121EN
OJ L, 30.9.2025
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.15.1. Use-specific instructions for use
Dose in a well-mixed point of the primary circuit, below the water level. Heavily fouled systems should be boiled
out prior to initial treatment.
Each slug dose lasts 30 minutes.
Initial dose (de-fouling treatment): 250 g glutaraldehyde per ton paper pulp.
Maintenance dose: 100 g glutaraldehyde per ton paper pulp.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.15.2. Use-specific risk mitigation measures
See general directions for use.
Application is only allowed in paper factories that comply with the Industrial Emission Directive 2010/75/EU
where wastewater is purified in an on-site industrial sewage treatment plant including a biological treatment step
in accordance to the Best Available Techniques (BAT) as prescribed in the BAT-reference document (BREF) for the
production of pulp, paper and board. Paper factories that are exempted from the Industrial Emission Directive
must discharge to the municipal sewer.
4.15.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.15.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.15.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.16. Use description
Table 16
Slimicide treatment in injection water in the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
70/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
Field(s) of use Outdoor use
Slimicide treatment in injection water in the oil and gas industry.
Application method(s) Method: closed system
Detailed description:
Dosing directly into the water stream using pumps, after mixing of
production water and make-up water and before injection of the
water into the petroleum reservoir.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3injection water.
Number and timing of application:
Batches may occur up to three times per week in severe cases, but
typically occur once per week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.16.1. Use-specific instructions for use
Injection water is often deaerated before being pumped into the sub-surface. Separation of chemical treatments
should be considered when dosing glutaraldehyde, as it may interfere with other common chemistries such as
anti-foams, oxygen scavengers, flocculants, and other oxidizing biocides (e.g. chlorite). Successive addition of
different chemical packages may be necessary to prevent cross reactivity and to optimize performance. When a
deaerator is present and treated with chlorite or a similar oxidizing chemistry, glutaraldehyde is typically dosed
after the deaerator.
Dose 50 to 1 000 g glutaraldehyde per m3injection water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 71/121EN
OJ L, 30.9.2025
4.16.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water. This
concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test to determine
the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.16.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.16.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.16.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.17. Use description
Table 17
Slimicide treatment in hydro-testing fluids and mothballing fluids in the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in hydro-testing fluids and mothballing fluids
in the oil and gas industry.
Application method(s) Method: closed system
Detailed description:
Continuous injection into the water stream during the pipeline
filling operation using chemical injection skids equipped with
injection pumps.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3hydro-testing fluid or
mothballing fluid, depending on the water quality and required
residence time within the equipment.
Number and timing of application:
There is no additional biocide injection into the hydro-testing fluid
once the filling operation is completed.
72/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
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Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.17.1. Use-specific instructions for use
Dose 50 to 1 000 g glutaraldehyde per m3 of hydro-testing fluid or mothballing fluid, depending on the water
quality and required residence time within the equipment.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.17.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the hydrotesting and mothballing
fluids. This concentration can be achieved either by slow release and/or long retention times resulting in
degradation of glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at
least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Hydrotest and mothballing water containing up to 750 mg/L glutaraldehyde after the pressure test can be used for
re-injection. Run lab test to determine the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.17.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.17.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.17.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
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4.18. Use description
Table 18
Slimicide treatment in water-based fracturing fluids for the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in water-based fracturing fluids for the oil and
gas industry (i.e. shale gas extraction, wet shale extraction, shale
oil extraction, production from tight gas reservoirs, production of
coal bed methane and fracturing in conventional reservoirs).
Application method(s) Method: closed system
Detailed description:
Dosing using automated pumps directly into pipelines or prepared
in a mixing tank before in-line application.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3fracturing fluid, in the
hydraulic fracturing water matrix.
Number and timing of application:
In the hydraulic fracturing industry the application of the biocidal
product is typically a single injection, which happens during the
actual fracturing. A new biocide addition is only done when the
well is re-fractured. Refracturing is rare but can be performed up
to 20 times during the lifetime of a well. The lifetime of a well can
reach up to 20 years.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
74/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.18.1. Use-specific instructions for use
Glutaraldehyde is typically applied through a closed system to a mixing tank using a pump Glutaraldehyde may be
used in combination with other chemistries such as friction reducers, gelling agents, proppants, and corrosion
inhibitors, and applied together with these chemistries in the mixing tank(s). If used for intermittent treatments
during operations, a stream of glutaraldehyde will be directly dosed into the process water stream from a separate
tank into a closed system, thereby significantly reducing the chance of exposure.
Dose 50 to 1 000 g glutaraldehyde per m3fracturing fluid, in the hydraulic fracturing water matrix.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.18.2. Use-specific risk mitigation measures
Preserved fracturing fluids are reused where applicable. If discharged into seawater 0,2 mg glutaraldehyde/L
fracturing fluid must not be exceeded. This concentration can be achieved either by slow release and/or long
retention times resulting in degradation of glutaraldehyde and/or by dilution and/or by addition of sodium
bisulphite at pH 5 (release after at least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at
least 10-16 hours) as degradation aids. Run lab test to determine the soiling dependent dosage and degradation
rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.18.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
In addition:
Conditions preventing emissions to water:
Emissions to surface water are prevented through the design of the installation. By way of example spills, leaks and
cleaning solutions may be drained to a lined storage area, preventing release to surface water. Sub-surface releases
of fluid during the fracturing process are prevented from reaching aquifers through the presence of relatively
impermeable formations above the target formation. This limits upward migration of fluid. This is also relevant
for recovered fluids that are re-injected for use or disposal. A minimum vertical separation distance between the
target formation and aquifer should be respected. National legislation may also require a minimum depth.
Recovered water may finally be discharged via one or more large-scale waste water treatment plants where a
combination of physical and biological treatments will reduce emissions to the receiving water.
Conditions preventing emissions to soil:
Emissions, through downward migration are prevented through the design of the installation. By way of example
spills, leaks and cleaning solutions may be prevented from downward migration to soil by the employment of a
non-permeable membrane below the well pad. Sludge from treatment works should not be spread on land.
Existence of standard municipal sewage treatment plant
Waste contractors employed to dispose of recovered water, may do so via a waste water treatment plant,
depending on the properties of the water and conditions of local regulations.
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4.18.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
Additional:
Contaminated water arising from cleaning will be collected and removed for disposal according to EU and local
regulations and conditions.
Waste product remaining in containers after use will be returned, in the containers, to the supplier for cleaning/
refilling.
Waste sludge from treatment works will be handled as industrial waste and not spread on land.
4.18.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.19. Use description
Table 19
Slimicide treatment in produced water for recycling in the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in produced water for recycling in the oil and
gas industry.
Application method(s) Method: closed system
Detailed description:
Dosing using pumps directly into the water stream before being
mixed with fresh injection water and pumped into the petroleum
reservoir.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3produced water.
Number and timing of application:
Batch treatment: Batches may occur up to three times per week in
severe cases, but typically occur once per week.
Continuous treatment: biocide is supplied in a continuous fashion
during operations.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
76/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.19.1. Use-specific instructions for use
Dose 50 to 1 000 g glutaraldehyde per m3produced water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.19.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water for recycling.
This concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water for recycling containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test
to determine the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.19.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.19.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.19.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
5. GENERAL DIRECTIONS FOR USE OF THE META SPC 2
5.1. Instructions for use
See use specific instructions for use.
5.2. Risk mitigation measures
Disconnecting the product container manually:
The use of eye protection (chemical goggles) consistent with EN 166 or equivalent during handling of the product
is mandatory.
Wear a protective coverall [type 3or type 4] consistent with EN 14605 or equivalent.
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OJ L, 30.9.2025
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
Use of respiratory protective equipment (RPE) providing a protection factor of 40 is mandatory. Providing at least
a powered air purifying respirator with helmet/hood/mask (TH3 (EN 12941 or equivalent)/TM3 (EN 12942 or
equivalent)), or a full-face mask (EN 136 or equivalent) with particle filter P3 (EN 12083 or equivalent).
During tank cleaning & maintenance:
Wear a protective coverall [type 3or type 4] consistent with EN 14605 or equivalent.
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
Use of respiratory protective equipment (RPE) providing a protection factor of 10 is mandatory. Providing at least
a powered air purifying respirator with helmet/hood/mask (TH1 (EN 12941 or equivalent)/TM1 (EN 12942 or
equivalent)), a half/quarter mask (EN 140 or equivalent) or a full-face mask (EN 136 or equivalent) with particle
filter P2 (EN 12083 or equivalent) each or a filtering half mask (FFP2, EN 149 or equivalent).
Draining, cleaning and maintenance of closed re-circulating system:
Wear a protective coverall [type 3or type 4] consistent with EN 14605 or equivalent.
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
Loading/unloading slurry tanks:
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
The product must be poured using an automated dosing system.
Ensure that application is carried out in well-ventilated areas.
Use engineering controls to maintain airborne level below exposure limit requirements or guidelines.
Use an approved air-purifying or positive-pressure supplied-air respirator depending on the potential airborne
concentration.
Regarding the personal protective equipment listed in this section, this is without prejudice to the application by
employers of Council Directive 98/24/EC and other Union legislation in the area of health and safety at work.
See section 6 for the full references to this act and the European Standards.
5.3. Particulars of likely direct or indirect effects, first aid instructions and emergency measures to protect
the environment
IF INHALED: Move to fresh air and keep at rest in a position comfortable for breathing.
If symptoms: Immediately call 112/ambulance for medical assistance.
IF SWALLOWED: If conscious, immediately rinse mouth. Give something to drink, if exposed person is able to
swallow. Do NOT induce vomiting. Call 112/ambulance for medical assistance.
IF ON SKIN: Immediately wash skin with plenty of water. Thereafter take off all contaminated clothing and wash it
before reuse. Continue to wash the skin with water for 15 minutes. Call a POISON CENTRE or a doctor. If skin
irritation or rash occur: Get medical advice.
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IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing for at least 15 minutes. Call 112/ambulance for medical assistance.
Information to Healthcare personnel/doctor:
Immediately initiate life support measures, thereafter call a POISON CENTRE.
Environmental precautions: Prevent from entering into soil, ditches, sewers, waterways and/or groundwater.
Spills or discharge to natural waterways is likely to kill aquatic organisms.
Personal precautions, protective equipment and emergency procedures in case of accidental release
measures:Evacuate area. Keep upwind of spill. Ventilate area of leak or spill. Only trained and properly protected
personnel must be involved in clean-up operations. Use appropriate safety equipment.
Methods and materials for containment and cleaning up: Avoid making contact with spilled material, since
glutaraldehyde will be absorbed by most shoes. When cleaning up a spill always wear the appropriate protective
equipment, including respiratory protection, gloves, protective clothing and eye protection. A self-contained
breathing apparatus or respirator and absorbents may be necessary, depending on the size of the spill and the
adequacy of ventilation.
Small spills: Wear the correct protective equipment including gloves and protective clothing and cover the liquid
with absorbent material. Collect and seal the material and the dirt that has absorbed the spilled material in
polyethylene bags and place in a drum for transit to an approved disposal site. Rinse away the remaining spilled
material with water to reduce odour, and discharge the rinsate into a municipal or industrial sewer, not into a
natural waterway.
Large spills: In case of nasal and respiratory irritation, vacate the room immediately. Personnel cleaning up should
be trained and equipped with a self-contained breathing apparatus, or an officially approved or certified full-face
respirator equipped with an organic vapor cartridge, glove, and clothing impervious to glutaraldehyde, including
rubber boots or shoe protection. Deactivate with sodium bisulfite (2-3 parts (by weight) per part of
glutaraldehyde), collect the neutralized liquid and place in a drum for transit to an approved disposal site.
5.4. Instructions for safe disposal of the product and its packaging
The biocidal product, when being disposed of in its unused and uncontaminated state should be treated as a
hazardous waste according to EC Directive 2008/98/EC.
Deactivate with sodium bisulfite (2-3 parts (by weight) per part of glutaraldehyde), collect the neutralized liquid
and place in a drum for transit to an approved disposal site. If the concentration of glutaraldehyde is up to 2%,
deactivate by the addition of aqueous sodium hydroxide solution in an amount sufficient to maintain a pH of 12
for 8 h, followed by neutralization (i.e. neutral pH) with the careful addition of an inorganic acid e.g. hydrochloric
acid, before disposal by appropriate means. Any disposal practices must be in compliance with all national and
provincial laws and any municipal or local by-laws governing hazardous waste. Do not dump into any sewers, on
the ground, or into any body of water. Avoid release to the environment. High-temperature incineration is an
acceptable practice glutaraldehyde burns cleanly to carbon dioxide and water.
Containers used to store glutaraldehyde solutions are non refillable. Do not reuse or refill the containers.
Containers should be triple or pressure rinsed with water promptly after they are emptied. They can then be
offered for recycling or reconditioning for biocidal products, or they can be punctured and disposed of in a
sanitary landfill or by other procedures approved by national and local authorities. Send waste liquid from rinsing
of used containers to an approved waste handling facility.
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5.5. Conditions of storage and shelf-life of the product under normal conditions of storage
Do not store in and avoid contact with aluminum, carbon steel, copper, mild steel, iron. Avoid contact with
amines, ammonia, strong acids, strong bases, strong oxidizers.
Store at temperatures <40 °C
Shelf life:
metaSPC GA 24: 24 months in HDPE and 12 months in stainless steel
6. OTHER INFORMATION
The full titles of the EN standards referenced in the Risk mitigation measures are:
EN ISO 374 – Protective gloves against dangerous chemicals and micro-organisms
EN 166 – Eye protection against chemicals.
EN 14605 – Protective clothing against liquid chemicals – Performance requirements for clothing with liquid-tight
(Type 3) or spray-tight (Type 4) connections, including items providing protection to parts of the body only (Types
PB [3] and PB [4]).
EN 12941 - Respiratory protective devices - Powered filtering devices incorporating a loose fitting respiratory
interface - Requirements, testing, marking
EN 12942 – Respiratory protective devices - Powered filtering devices incorporating full face masks, half masks or
quarter masks - Requirements, testing, marking
EN 136 - Respiratory protective devices. Full face masks. Requirements, testing, marking
EN 140 - Respiratory protective devices - Half masks and quarter masks - Requirements, testing, marking
EN 149 - Respiratory protective devices - Filtering half masks to protect against particles - Requirements, testing,
marking
EN 12083 - Respiratory protective devices – Filters with breathing hoses, (Non-mask mounted filters) – Particle
filters, gas filters, and combined filters – Requirements, testing, marking
Council Directive 98/24/EC of 7 April 1998 on the protection of the health and safety of workers from the risks
related to chemical agents at work (fourteenth individual Directive within the meaning of Article 16(1) of
Directive 89/391/EEC) (OJ L 131, 5.5.1998, p. 11).
With respect to the “Category (ies) of users” note: “Professionals (including industrial users) means trained
professionals if this is required by national legislation.
7. THIRD INFORMATION LEVEL: INDIVIDUAL PRODUCTS IN THE META SPC 2
7.1. Trade name(s), authorisation number and specific composition of each individual product
Trade name(s) BCI Market area: EU
D91125A
Isigard® Market area: EU
GA 24
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AQU Market area: EU
CAR(TM)
GA 24
Water
Treatment
Microbio
cide
Preventol® Market area: EU
GA 24
UCARCI Market area: EU
DE(TM) 24
Antimicro
bial
ACQ 814 Market area: EU
ACTI Market area: EU
CIDE®
GDA 24
ALOSUC Market area: EU
867D
AQUACIDE Market area: EU
420 A
aqualead® Market area: EU
BC GA 24
Bactron Market area: EU
B1125
Bactron Market area: EU
B1150
Bansan 240 Market area: EU
Beaumont Market area: EU
C 412
TT-TE
BIO Market area: EU
C11125A
BIO Market area: EU
C11150A
SANIPOL® Market area: EU
PG 24
Bulab 6112 Market area: EU
Busan Market area: EU
1205
Butrol Market area: EU
1205
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CAT-3600 Market area: EU
CHIMEC Market area: EU
1022
Desalgin T Market area: EU
710
Dilurit® Market area: EU
946 V
Elbolit Market area: EU
GDA
FB 228 Market area: EU
FennoSan Market area: EU
GL24
Ferrocid® Market area: EU
8589
GABOTEC Market area: EU
G 24% B
GABOTEC Market area: EU
G 24% B6
GLUT- Market area: EU
ACTIVE 24
IOB
GLUT- Market area: EU
ACTIVE
24-A IOB
GLUT- Market area: EU
ACTIVE
24-B IOB
GWC - Market area: EU
BAC-434
GWC-3600 Market area: EU
HYDREX Market area: EU
7515
HYDRO Market area: EU
GAL 502
Hydrogel Market area: EU
KW 70 B
HYDRO Market area: EU
SAN
ALOSUC Market area: EU
867D
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MB-544 Market area: EU
Nalco Market area: EU
EC6111E
Nalco Market area: EU
EC6202A
Neudos MB Market area: EU
25
NovoCide Market area: EU
21
PROSOLV Market area: EU
BI8814
SPECTRUS Market area: EU
NX1461
Warosit Market area: EU
247
Warostat Market area: EU
3247
XC80102 Market area: EU
ZEP - NO Market area: EU
FUNGI 527
Authorisation number EU-0030162-0002 1-2
Common name IUPAC name Function CAS number EC number Content (%)
Glutaraldehyde 1,5-pentanedial Active 111-30-8 203-856-5 24,2 % (w/w)
substance
1. META SPC 3 ADMINISTRATIVE INFORMATION
1.1. Meta SPC 3 identifier
Identifier Meta SPC: meta SPC GA 13.5
1.2. Suffix to the authorisation number
Number 1-3
1.3. Product type(s)
Product type(s) PT06: Preservatives for products during storage
PT11: Preservatives for liquid-cooling and processing
systems
PT12: Slimicides
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2. META SPC 3 COMPOSITION
2.1. Qualitative and quantitative information on the composition of the meta SPC 3
Common name IUPAC name Function CAS number EC number Content (%)
Glutaraldehyde 1,5-pentane Active 111-30-8 203-856-5 12,9 - 14,6 % (w/w)
dial substance
2.2. Type(s) of formulation of the meta SPC 3
Formulation type(s) AL Any other liquid
3. HAZARD AND PRECAUTIONARY STATEMENTS OF THE META SPC 3
Hazard statements H302: Harmful if swallowed.
H314: Causes severe skin burns and eye damage.
H317: May cause an allergic skin reaction.
H332: Harmful if inhaled.
H334: May cause allergy or asthma symptoms or
breathing difficulties if inhaled.
H412: Harmful to aquatic life with long lasting effects.
EUH071: Corrosive to the respiratory tract.
Precautionary statements P260: Do not breathe spray.
P271: Use only outdoors or in a well-ventilated area.
P280: Wear protective gloves.
P273: Avoid release to the environment.
P284: [In case of inadequate ventilation] wear
respiratory protection.
P301+P310: IF SWALLOWED: Immediately call a
POISON CENTER.
P303+P361+P353: IF ON SKIN (or hair): Take off
immediately all contaminated clothing. Rinse skin with
water [or shower].
P304+P340: IF INHALED: Remove person to fresh air
and keep comfortable for breathing.
P310: Immediately call a POISON CENTER.
P305+P351+P338: IF IN EYES: Rinse cautiously with
water for several minutes. Remove contact lenses, if
present and easy to do. Continue rinsing.
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P342+P311: If experiencing respiratory symptoms:
Call a POISON CENTER.
P501: Dispose of contents to a hazardous waste
disposal service in accordance with the statutory
regulations.
P501: Dispose of container to a hazardous waste
disposal service in accordance with the statutory
regulations.
4. AUTHORISED USE(S) OF THE META SPC
4.1. Use description
Table 1
Short-term preservation of the industrial process, i.e. preservation during the production and/or storage
of latexes (one week) and waterborne paints (three weeks) in the plant prior to final packaging
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Short-term efficacy to maintain plant hygiene and prevent
intermediate production mixtures of latexes and water-borne
paints from spoiling.
Application method(s) Method: closed system
Detailed description:
The biocidal products are stored either in a single large tank or in
several tanks, and dosed into raw materials or intermediate
mixtures during the production process.
Dose the biocidal product to the end use fluid at a point to ensure
adequate mixing using automated or manual metering.
Application rate(s) and frequency Application Rate:
Paints: 0,1 to 0,95 g glutaraldehyde per kg of matrix for
preventive use. Paints: 0,1 to 0,95 g glutaraldehyde per kg of
matrix with a contact time of 7 days for curative use. Latexes: 0,1
to 0,6 g glutaraldehyde per kg of matrix for preventive use.
Latexes: 0,1 to 0,6 g glutaraldehyde per kg of matrix with a
contact time of 7 days for curative use.
Number and timing of application:
Once per production run of the product to preserve.
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Glutaraldehyde provides immediate efficacy and short-term
preservation up to three weeks for paints and one week for latexes.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.1.1. Use-specific instructions for use
Dose the biocidal product to the end use fluid at a point to ensure adequate mixing, using automated or manual
metering.
Paints: 0,1 to 0,95 g glutaraldehyde per kg of matrix.
Latexes: 0,1 to 0,6 g glutaraldehyde per kg of matrix.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.1.2. Use-specific risk mitigation measures
The product must not be added to paints and coatings which are applied by spraying.
See also the general directions for use.
4.1.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.1.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.1.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
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4.2. Use description
Table 2
Preservation of washing and cleaning fluids.
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Preservation of washing and cleaning fluids (i.e. hard surface
cleaners (all-purpose cleaners), hand dish washing products, fabric
softeners and laundry detergents).
Application method(s) Method: closed system
Detailed description:
Dose the biocidal product to the end use fluid at a point to ensure
adequate mixing using automated or manual metering.
Application rate(s) and frequency Application Rate:
0,3 to 0,95 g glutaraldehyde per 1 kg of the final product for
preventive use against bacteria.
0,2 to 0,95 g glutaraldehyde per 1 kg of the final product for
preventive use against yeasts and fungi.
0,3 to 0,95 g glutaraldehyde per 1 kg of the final product with a
contact time of 7 days for curative use against bacteria.
0,2 to 0,95 g glutaraldehyde per 1 kg of the final product with a
contact time of 7 days for curative use against yeasts and fungi.
Number and timing of application:
Once per production run of the product to preserve.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
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— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.2.1. Use-specific instructions for use
Dose the biocidal product to the end use fluid at a point to ensure adequate mixing using automated or manual
metering.
Dose:
Bacteria: 0,3 to 0,95 g glutaraldehyde per 1 kg of the final product.
Yeasts & Fungi: 0,2 to 0,95 g glutaraldehyde per 1 kg of the final product.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.2.2. Use-specific risk mitigation measures
See general directions for use.
4.2.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.2.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.2.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.3. Use description
Table 3
Preservation of pigment pastes/mineral slurries to colour a wide variety of products (e.g. textiles, inks,
paints, paper)
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Indoor use
Pigment pastes and mineral slurries used to colour a wide variety
of products (e.g. textiles (carpet fibres, carpet backing, canvas,
cordage, drapes and shower curtains), inks, paints, paper).
Application method(s) Method: closed system
Detailed description:
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Good mixing and uniform distribution of the biocidal product
should be ensured using automated or manual metering. Pigment
pastes are readily incorporated by low energy mixing equipment
requiring no additional dispersion.
Application rate(s) and frequency Application Rate:
0,25 to 0,5 g glutaraldehyde per kg of the pigment paste/mineral
slurry for preventive use. 0,25 to 0,5 g glutaraldehyde per kg of
the pigment paste/mineral slurry with a contact time of 2 days for
curative use.
Number and timing of application:
Once per production run of the product to preserve.
Glutaraldehyde provides immediate efficacy and prevents re-growth
for a period up to 3 weeks.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.3.1. Use-specific instructions for use
Dose the biocidal product to the pigment paste or mineral slurry at a point to ensure adequate mixing using
automated or manual metering.
Dose 0,25 to 0,5 g glutaraldehyde per kg of the pigment paste/mineral slurry.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.3.2. Use-specific risk mitigation measures
See general directions for use.
4.3.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
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4.3.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.3.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.4. Use description
Table 4
Preservation of additives for the production of paper
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Preservation of paper additives used in paper mills.
Application method(s) Method: closed system
Detailed description:
The biocidal product is automatically added by means of a dosing
pump and dedicated feeding lines in the additives tank.
Application rate(s) and frequency Application Rate:
For bacteria, 0,1 to 0,5 g glutaraldehyde per kg of the paper
additive for preventive use. For yeasts and fungi, 0,25 to 0,5 g
glutaraldehyde per kg of the paper additive for preventive use. For
bacteria, 0,1 to 0,5 g glutaraldehyde per kg of the paper additive
with a contact time of 2 days for curative use. For yeasts and fungi,
0,25 to 0,5 g glutaraldehyde per kg of the paper additive with a
contact time of 2 days for curative use.
Number and timing of application:
Once per production run of the product to preserve.
Glutaraldehyde provides immediate efficacy and prevents
re-growth for a period up to 3 weeks.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
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— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.4.1. Use-specific instructions for use
Dose the biocidal product to the paper additive at a point to ensure adequate mixing using automated or manual
metering.
For bacteria, 0,1 to 0,5 g glutaraldehyde per kg of the paper additive.
For yeasts and fungi, 0,25 to 0,5 g glutaraldehyde per kg of the paper additive.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.4.2. Use-specific risk mitigation measures
See general directions for use.
4.4.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.4.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.4.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.5. Use description
Table 5
Preservation of crude oil
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
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Field(s) of use Outdoor use
Preservation of crude oil with associated water in preparation for
further processing.
Application method(s) Method: closed system
Detailed description:
Batch injection via dosing pump and dedicated feed lines in stored
volume of fuels.
Application rate(s) and frequency Application Rate:
0,025 to 0,4 g glutaraldehyde per liter of water content in crude
oil for preventive use. 0,025 to 0,4 g glutaraldehyde per liter of
water content in crude oil with a contact time of 24 hours for
curative use.
Number and timing of application:
Once per week.
Glutaraldehyde provides immediate efficacy and short-term
preservation up to one week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.5.1. Use-specific instructions for use
Crude tanks being treated should be at least 10% full before treatment. Do not dispense into empty crude
tanks. When treating storage tanks, please note that effective treatment will only be achieved with efficient
mixing. Ideally, the biocidal product should be dosed into a flowing crude oil stream in the storage tank inlet.
Dose 0,025 to 0,4 g glutaraldehyde per liter of water content in crude oil.
Dose level should be proportional to the risk and level of infection, and anticipated time before the next treatment
or fluid discharge. Dosing system should be a closed system. Adequate agitation is required to ensure homogeneity
throughout the fluid volume.
The dose and frequency strongly depend on the formulation and intended use of the matrix (crude oil) to which
the preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system
to be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
92/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.5.2. Use-specific risk mitigation measures
See general directions for use.
Additionally: In case of direct release of the aqueous phase to the sewer the concentration shall not exceed
0,75 mg glutaraldehyde/L.
4.5.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.5.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
Associated water should be disposed of according to all local and regional regulations.
See general directions for use.
4.5.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.6. Use description
Table 6
Preservation of drilling fluids in the oil and gas industry
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of fluids, (e.g., drill muds, cementing fluids, spacer
fluids) used in the drilling of oil, gas and water wells.
Application method(s) Method: closed system
Detailed description:
Periodical injection directly into prepared drilling fluids.
Application rate(s) and frequency Application Rate:
0,25 to 0,5 g glutaraldehyde per liter of drilling fluid with a
contact time of 1 hour for curative use.
Number and timing of application:
Treatment is required when there is evidence, or a very high
likelihood, of microbial degradation of drilling fluids. Treatment
can be repeated as often as required, based on monitoring of
microbial populations and biocide concentration. Resurgent and
robust microbial populations should be treated at most 3 times
per week.
Category(ies) of users Industrial
Trained professional
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 93/121EN
OJ L, 30.9.2025
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.6.1. Use-specific instructions for use
Dose 0,25 to 0,5 g glutaraldehyde per liter of drilling fluid.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
Ensure that treated material is separated from other muds after use. Used drilling fluids must be injected directly
into the formation, collected for reuse in a separate, closed container, or disposed of properly according to local,
state, or federal requirements as described in the SDS. It is not allowed to discharge used drilling fluids overboard.
4.6.2. Use-specific risk mitigation measures
Preserved materials must be recycled or disposed of as solid waste.
See also the general directions for use.
4.6.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.6.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.6.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
94/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.7. Use description
Table 7
Preservation of fracturing fluids during storage in the oil and gas industry
Product type PT06: Preservatives for products during storage
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of fluids used in the fracturing process.
Application method(s) Method: closed system
Detailed description:
Injection directly into prepared fracturing fluids.
Application rate(s) and frequency Application Rate:
0,25 to 0,5 g glutaraldehyde per liter of fracturing fluid for
preventive use. 0,25 to 0,5 g glutaraldehyde per liter of fracturing
fluid with a contact time of 1 hour for curative use.
Number and timing of application:
Treatment is required when there is evidence, or a very high
likelihood, of microbial degradation of fracturing fluids. Treatment
can be repeated as often as required, based on monitoring of
microbial populations and biocide concentration. Resurgent and
robust microbial populations should be treated at most 3 times
per week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 95/121EN
OJ L, 30.9.2025
4.7.1. Use-specific instructions for use
Dose 0,25 to 0,5 g glutaraldehyde per liter of fracturing fluid.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.7.2. Use-specific risk mitigation measures
See general directions for use.
4.7.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.7.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
Additional:
Contaminated water arising from cleaning will be collected and removed for disposal according to EU and local
regulations and conditions.
Waste product remaining in containers after use will be returned, in the containers, to the supplier for cleaning/
refilling.
Waste sludge from treatment works will be handled as industrial waste and not spread on land.
4.7.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.8. Use description
Table 8
Preservation of liquids used in closed re-circulating cooling systems
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Indoor use
Outdoor use
Liquid-closed re-circulating cooling/heating and processing
systems.
Application method(s) Method: closed system
Detailed description:
Dosing into the cooling system.
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OJ L, 30.9.2025
Application rate(s) and frequency Application Rate:
25 to 200 g glutaraldehyde per m3of water.
Number and timing of application:
Bi- or tri- monthly according to the characteristics of the system
and the stability of the biocidal product in the treated water.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.8.1. Use-specific instructions for use
It is recommended to mechanically cleanse dirty systems with fresh water before starting the treatment with the
biocidal product.
Dose in a well-mixed point of the circuit, below the water level. When opening the system for servicing or
maintenance, biocide can be added to reach the initial dosing concentrations.
System monitor
Control the level of biocide with a test kit at least every 3 months and prior to shut off period of the system.
Control microbial contamination with dip slides or other appropriate techniques at least every 3 months
Particular attention should be addressed during the shut off period of the system where stagnant fluids are more
susceptible to microbial contamination.
Dose 25 to 200 g glutaraldehyde per m3of water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.8.2. Use-specific risk mitigation measures
Drain off preserved cooling fluids at least five days after the last addition of the biocidal product.
See also the general directions for use.
4.8.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 97/121EN
OJ L, 30.9.2025
4.8.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.8.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.9. Use description
Table 9
Preservation of liquids used in open re-circulating cooling systems
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: green algae
Development stage: no data
Field(s) of use Outdoor use
Liquid-open re-circulating cooling and processing systems.
Application method(s) Method: open system
Detailed description:
Glutaraldehyde is automatically added in the water circuit, usually
as upstream as possible, by means of injection by a dosing pump
and dedicated feeding lines. A timer is used for intermittent
dosage.
Application rate(s) and frequency Application Rate:
25 to 50 g glutaraldehyde per m3of water
Number and timing of application:
Typical dose: 1-2 days
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
98/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.9.1. Use-specific instructions for use
For control of microbial growth in industrial cooling water systems treated with a biocidal product by slug dosing.
Not intended for use in once-through cooling systems. Most cooling towers work continuously over the whole
year. The evaporation rate increases in summer when the air is warm but the temperature of the water remains
suitable for the micro-organisms all over the year because it is warmed up by the industrial process that generates
an excess of heat.
It is recommended to mechanically cleanse dirty systems before starting the treatment with the biocidal product.
Dose in a well-mixed point of the circuit, below the water level.
Typical dose: 1-2 days. Each slug dose lasts 15-30 minutes, depending on the pump capacity and the volume of
water in the circuit. Treatment should not exceed 2 days.
Dose 25 to 50 g glutaraldehyde per m3of water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.9.2. Use-specific risk mitigation measures
The use is restricted to small cooling systems with a maximum blowdown of 2 m3/h. Waste water must be
discharged to the municipal sewer, purified in an on-site industrial sewage treatment plant including a biological
treatment step, or directly to surface water via a settling pond that allows sufficient retention.
4.9.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.9.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.9.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 99/121EN
OJ L, 30.9.2025
4.10. Use description
Table 10
Preservation of injection water in the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of injection water in the oil and gas industry.
Application method(s) Method: closed system
Detailed description:
The biocidal product is dosed using automated pumps directly
into the water stream, after mixing of production water and
make-up water into the petroleum reservoir.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
injection water with a contact time of 24 hours. Anaerobic
bacteria: preventive, use 150 to 1 000 g glutaraldehyde per m3of
injection water.
Number and timing of application:
The biocidal product is typically dosed in a weekly batch fashion,
ranging from one to five hours per dose. Batches may occur up to
three times per week in severe cases.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
100/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
4.10.1. Use-specific instructions for use
Glutaraldehyde should be dosed separately from other oil field chemistries such as antifoaming agents, oxygen
scavengers, flocculants, or other oxidizing biocides (e.g. chlorite) in order to prevent cross reactivity. Successive
addition may therefore be required to optimize performance. If a deaerator is being treated with oxidizing
biocides, glutaraldehyde should be dosed downstream of the deaeration unit.
Dose 50 to 1 000 g glutaraldehyde per m3of injection water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.10.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water. This
concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test to determine
the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.10.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.10.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.10.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.11. Use description
Table 11
Preservation of hydro-testing fluids and mothballing fluids in the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of hydro-testing fluids and mothballing fluids in the
oil and gas industry.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 101/121EN
OJ L, 30.9.2025
Application method(s) Method: closed system
Detailed description:
Continuous injection into the water stream during the pipeline
filling operation using chemical injection skids equipped with
injection pumps.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
hydro-testing fluid or mothballing fluid with a contact time of 24
hours, depending on the water quality. Anaerobic bacteria:
preventive use, 150 to 1 000 g glutaraldehyde per m3of hydro-
testing fluid or mothballing fluid, depending on the water quality
and required residence time within the equipment.
Number and timing of application:
There is no additional biocide injection into the hydro-testing fluid
once the filling operation is completed.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.11.1. Use-specific instructions for use
Dose 50 to 1 000 g glutaraldehyde per m3 of hydro-testing fluid or mothballing fluid, depending on the water
quality and required residence time within the equipment.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.11.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the hydrotesting and mothballing
fluids. This concentration can be achieved either by slow release and/or long retention times resulting in
degradation of glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at
least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Hydrotest and mothballing water containing up to 750 mg/L glutaraldehyde after the pressure test can be used for
re-injection. Run lab test to determine the soiling dependent dosage and degradation rate in use.
102/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
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When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.11.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.11.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.11.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.12. Use description
Table 12
Preservation of water-based fracturing fluids for the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Preservation of water-based fracturing fluids for the oil and gas
industry (i.e. shale gas extraction, wet shale extraction, shale oil
extraction, production from tight gas reservoirs, production of
coal bed methane and fracturing in conventional reservoirs).
Application method(s) Method: closed system
Detailed description:
Glutaraldehyde is typically applied in a mixing tank, as it cannot
be exposed to open systems such as the hydraulic fracturing pond
or other open water sources that make up the hydraulic fracturing
pond water.Glutaraldehyde is applied to the mixing tank using
automated pumps, together with other chemicals such as but not
limited to friction reducers, gelling agents, proppants (sand in case
of slick water), corrosion inhibitors.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
fracturing fluid with a contact time of 24 hours. Anaerobic
bacteria: preventive use, 150 to 1 000 g glutaraldehyde per m3of
fracturing fluid.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 103/121EN
OJ L, 30.9.2025
Number and timing of application:
In the hydraulic fracturing industry the application of the biocidal
product is typically a single injection, which happens during the
actual fracturing. A new biocide addition is only done when the
well is re-fractured. Refracturing is rare but can be performed up
to 20 times during the lifetime of a well. The lifetime of a well can
reach up to 20 years.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.12.1. Use-specific instructions for use
Typically applied through a closed system to a mixing tank using a pump. Glutaraldehyde may be used in
combination with other chemistries such as friction reducers, gelling agents, proppants, and corrosion inhibitors,
and applied together with these chemistries in the mixing tank(s). If used for intermittent treatments during
operations, a stream of glutaraldehyde will be directly dosed into the process water stream from a separate tank
into a closed system, thereby significantly reducing the chance of exposure.
Dose 50 to 1 000 g glutaraldehyde per m3of fracturing fluid.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.12.2. Use-specific risk mitigation measures
Preserved fracturing fluids are reused where applicable. If discharged into seawater 0,2 mg glutaraldehyde/L
fracturing fluid must not be exceeded. This concentration can be achieved either by slow release and/or long
retention times resulting in degradation of glutaraldehyde and/or by dilution and/or by addition of sodium
bisulphite at pH 5 (release after at least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at
least 10-16 hours) as degradation aids. Run lab test to determine the soiling dependent dosage and degradation
rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
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4.12.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use. In addition:
Conditions preventing emissions to water:
Emissions to surface water are prevented through the design of the installation. By way of example spills, leaks and
cleaning solutions may be drained to a lined storage area, preventing release to surface water. Sub-surface releases
of fluid during the fracturing process are prevented from reaching aquifers through the presence of relatively
impermeable formations above the target formation. This limits upward migration of fluid. This is also relevant
for recovered fluids that are re-injected for use or disposal. A minimum vertical separation distance between the
target formation and aquifer should be respected. National legislation may also require a minimum depth/
Recovered water may finally be discharged via one or more large-scale waste water treatment plants where a
combination of physical and biological treatments will reduce emissions to the receiving water.
Conditions preventing emissions to soil:
Emissions, through downward migration are prevented through the design of the installation. By way of example
spills, leaks and cleaning solutions may be prevented from downward migration to soil by the employment of a
non-permeable membrane below the well pad. Sludge from treatment works should not be spread on land.
Existence of standard municipal sewage treatment plant
Waste contractors employed to dispose of recovered water, may do so via a waste water treatment plant,
depending on the properties of the water and conditions of local regulations.
4.12.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use. Additional:
Contaminated water arising from cleaning will be collected and removed for disposal according to EU and local
regulations and conditions.
Waste product remaining in containers after use will be returned, in the containers, to the supplier for cleaning/
refilling.
Waste sludge from treatment works will be handled as industrial waste and not spread on land.
4.12.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.13. Use description
Table 13
Preservation of produced water for recycling in the oil and gas industry
Product type PT11: Preservatives for liquid-cooling and processing systems
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
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Field(s) of use Outdoor use
Preservation of produced water for recycling in the oil and gas
extraction industry.
Application method(s) Method: closed system
Detailed description:
Dosing using pumps directly into the water stream before being
mixed with fresh injection water and pumped into the petroleum
reservoir.
Application rate(s) and frequency Application Rate:
Bacteria: curative use, 50 to 1 000 g glutaraldehyde per m3of
produced water with a contact time of 24 hours. Anaerobic
bacteria: preventive use, 150 to 1 000 g glutaraldehyde per m3of
produced water.
Number and timing of application:
Batch treatment: The biocidal product is typically dosed in a
weekly batch fashion, ranging from one to five hours per dose.
Batches may occur up to three times per week in severe cases, but
typically occur once per week.
Continuous treatment: biocide is supplied in a continuous fashion
during operations.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.13.1. Use-specific instructions for use
Dose for the preservation of produced water before re-use 50 to 1 000 g glutaraldehyde per m3of produced water.
This can be done batch wise or continuously.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.13.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water. This
concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test to determine
the soiling dependent dosage and degradation rate in use.
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When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.13.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.13.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.13.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.14. Use description
Table 14
Slimicide treatment in the wet-end stage of the pulp and paper manufacturing process
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Slimicide treatment in the wet-end stage of the pulp and paper
manufacturing process.
Application method(s) Method: closed system
Detailed description:
Automatic dosing by a pump and fixed pipes into the primary
circuit, usually in the collection sump or in the headbox.
Application rate(s) and frequency Application Rate:
Initial dose (wet-end defouling treatment): 250 g glutaraldehyde
per ton paper pulp. Wet-end maintenance dose: 100 g
glutaraldehyde per ton paper pulp.
Number and timing of application:
Initial dose (Wet end de-fouling treatment): 2-6 automatic slug (=
shock) dose additions/day. Repeat 1 to 3 days until control is
achieved.
Wet-end maintenance dose: 2-6 automatic slug dose additions/day,
as necessary to maintain control.
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Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.14.1. Use-specific instructions for use
Dose in a well-mixed point of the primary circuit, below the water level. Heavily fouled systems should be boiled
out prior to initial treatment.
Each slug dose lasts 15-30 minutes.
Initial dose (wet-end defouling treatment): 250 g glutaraldehyde per ton paper pulp.
Wet-end maintenance dose: 100 g glutaraldehyde per ton of paper pulp.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.14.2. Use-specific risk mitigation measures
Application is only allowed in paper factories that comply with the Industrial Emission Directive 2010/75/EU
where wastewater is purified in an on-site industrial sewage treatment plant including a biological treatment step
in accordance to the Best Available Techniques (BAT) as prescribed in the BAT-reference document (BREF) for the
production of pulp, paper and board. The effluent must be diluted at least 200 times. Paper factories that are
exempted from the Industrial Emission Directive must discharge to the municipal sewer.
4.14.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.14.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.14.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
108/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
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4.15. Use description
Table 15
Slimicide treatment in the de-inking process of the pulp and paper
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Scientific name: no data
Common name: yeasts
Development stage: no data
Scientific name: no data
Common name: fungi
Development stage: no data
Field(s) of use Indoor use
Slimicide treatment in the de-inking process of the pulp and
paper.
Application method(s) Method: closed system
Detailed description:
Automatic dosing by pump and fixed pipes into the circuit, usually
in the pulper.
Application rate(s) and frequency Application Rate:
Initial dose (de-fouling treatment): 250 g glutaraldehyde per ton
paper pulp. Maintenance dose: 100 g glutaraldehyde per ton paper
pulp.
Number and timing of application:
Initial dose (de-fouling treatment): 1-2 automatic slug (= shock)
dose additions/day. Repeat for 1 to 2 days until control is achieved.
Maintenance dose: 1-2 automatic slug dose additions/day, as
necessary to maintain control.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 109/121EN
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4.15.1. Use-specific instructions for use
Dose in a well-mixed point of the primary circuit, below the water level. Heavily fouled systems should be boiled
out prior to initial treatment.
Each slug dose lasts 30 minutes.
Initial dose (de-fouling treatment): 250 g glutaraldehyde per ton paper pulp.
Maintenance dose: 100 g glutaraldehyde per ton paper pulp.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.15.2. Use-specific risk mitigation measures
See general directions for use.
Application is only allowed in paper factories that comply with the Industrial Emission Directive 2010/75/EU
where wastewater is purified in an on-site industrial sewage treatment plant including a biological treatment step
in accordance to the Best Available Techniques (BAT) as prescribed in the BAT-reference document (BREF) for the
production of pulp, paper and board. Paper factories that are exempted from the Industrial Emission Directive
must discharge to the municipal sewer.
4.15.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.15.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.15.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.16. Use description
Table 16
Slimicide treatment in injection water in the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in injection water in the oil and gas industry.
Application method(s) Method: closed system
Detailed description:
Dosing directly into the water stream using pumps, after mixing of
production water and make-up water and before injection of the
water into the petroleum reservoir.
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Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3injection water.
Number and timing of application:
Batches may occur up to three times per week in severe cases, but
typically occur once per week.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.16.1. Use-specific instructions for use
Injection water is often deaerated before being pumped into the sub-surface. Separation of chemical treatments
should be considered when dosing glutaraldehyde, as it may interfere with other common chemistries such as
anti-foams, oxygen scavengers, flocculants, and other oxidizing biocides (e.g. chlorite). Successive addition of
different chemical packages may be necessary to prevent cross reactivity and to optimize performance. When a
deaerator is present and treated with chlorite or a similar oxidizing chemistry, glutaraldehyde is typically dosed
after the deaerator.
Dose 50 to 1 000 g glutaraldehyde per m3injection water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.16.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water. This
concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test to determine
the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.16.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 111/121EN
OJ L, 30.9.2025
See general directions for use.
4.16.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.16.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.17. Use description
Table 17
Slimicide treatment in hydro-testing fluids and mothballing fluids in the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in hydro-testing fluids and mothballing fluids
in the oil and gas industry.
Application method(s) Method: closed system
Detailed description:
Continuous injection into the water stream during the pipeline
filling operation using chemical injection skids equipped with
injection pumps.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3hydro-testing fluid or
mothballing fluid, depending on the water quality and required
residence time within the equipment.
Number and timing of application:
There is no additional biocide injection into the hydro-testing fluid
once the filling operation is completed.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
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— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.17.1. Use-specific instructions for use
Dose 50 to 1 000 g glutaraldehyde per m3 of hydro-testing fluid or mothballing fluid, depending on the water
quality and required residence time within the equipment.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.17.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the hydrotesting and mothballing
fluids. This concentration can be achieved either by slow release and/or long retention times resulting in
degradation of glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at
least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Hydrotest and mothballing water containing up to 750 mg/L glutaraldehyde after the pressure test can be used for
re-injection. Run lab test to determine the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.17.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.17.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.17.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
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4.18. Use description
Table 18
Slimicide treatment in water-based fracturing fluids for the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in water-based fracturing fluids for the oil and
gas industry (i.e. shale gas extraction, wet shale extraction, shale
oil extraction, production from tight gas reservoirs, production of
coal bed methane and fracturing in conventional reservoirs).
Application method(s) Method: closed system
Detailed description:
Dosing using automated pumps directly into pipelines or prepared
in a mixing tank before in-line application.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3fracturing fluid, in the
hydraulic fracturing water matrix.
Number and timing of application:
In the hydraulic fracturing industry the application of the biocidal
product is typically a single injection, which happens during the
actual fracturing. A new biocide addition is only done when the
well is re-fractured. Refracturing is rare but can be performed up
to 20 times during the lifetime of a well. The lifetime of a well can
reach up to 20 years.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
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4.18.1. Use-specific instructions for use
Glutaraldehyde is typically applied through a closed system to a mixing tank using a pump Glutaraldehyde may be
used in combination with other chemistries such as friction reducers, gelling agents, proppants, and corrosion
inhibitors, and applied together with these chemistries in the mixing tank(s). If used for intermittent treatments
during operations, a stream of glutaraldehyde will be directly dosed into the process water stream from a separate
tank into a closed system, thereby significantly reducing the chance of exposure.
Dose 50 to 1 000 g glutaraldehyde per m3fracturing fluid, in the hydraulic fracturing water matrix.
The dose strongly depends on the formulation and intended use of the matrix to which the preservative is added.
Therefore, the user shall determine dosage requirements for their specific matrix/system to be preserved. The
lowest effective dose shall be used. If needed, consult the authorisation holder of the preservative product.
4.18.2. Use-specific risk mitigation measures
Preserved fracturing fluids are reused where applicable. If discharged into seawater 0,2 mg glutaraldehyde/L
fracturing fluid must not be exceeded. This concentration can be achieved either by slow release and/or long
retention times resulting in degradation of glutaraldehyde and/or by dilution and/or by addition of sodium
bisulphite at pH 5 (release after at least 20 minutes) or addition of sodium hydroxide to pH 12 (release after at
least 10-16 hours) as degradation aids. Run lab test to determine the soiling dependent dosage and degradation
rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.18.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use. In addition:
Conditions preventing emissions to water:
Emissions to surface water are prevented through the design of the installation. By way of example spills, leaks and
cleaning solutions may be drained to a lined storage area, preventing release to surface water. Sub-surface releases
of fluid during the fracturing process are prevented from reaching aquifers through the presence of relatively
impermeable formations above the target formation. This limits upward migration of fluid. This is also relevant
for recovered fluids that are re-injected for use or disposal. A minimum vertical separation distance between the
target formation and aquifer should be respected. National legislation may also require a minimum depth
Recovered water may finally be discharged via one or more large-scale waste water treatment plants where a
combination of physical and biological treatments will reduce emissions to the receiving water.
Conditions preventing emissions to soil:
Emissions, through downward migration are prevented through the design of the installation. By way of example
spills, leaks and cleaning solutions may be prevented from downward migration to soil by the employment of a
non-permeable membrane below the well pad. Sludge from treatment works should not be spread on land.
Existence of standard municipal sewage treatment plant
Waste contractors employed to dispose of recovered water, may do so via a waste water treatment plant,
depending on the properties of the water and conditions of local regulations.
4.18.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use. Additional:
Contaminated water arising from cleaning will be collected and removed for disposal according to EU and local
regulations and conditions.
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Waste product remaining in containers after use will be returned, in the containers, to the supplier for cleaning/
refilling.
Waste sludge from treatment works will be handled as industrial waste and not spread on land.
4.18.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
4.19. Use description
Table 19
Slimicide treatment in produced water for recycling in the oil and gas industry
Product type PT12: Slimicides
Where relevant, an exact description of the Not relevant.
authorised use
Target organism(s) (including development Scientific name: no data
stage) Common name: bacteria
Development stage: no data
Field(s) of use Outdoor use
Slimicide treatment in produced water for recycling in the oil and
gas industry.
Application method(s) Method: closed system
Detailed description:
Dosing using pumps directly into the water stream before being
mixed with fresh injection water and pumped into the petroleum
reservoir.
Application rate(s) and frequency Application Rate:
50 to 1 000 g glutaraldehyde per m3produced water.
Number and timing of application:
Batch treatment: Batches may occur up to three times per week in
severe cases, but typically occur once per week.
Continuous treatment: biocide is supplied in a continuous fashion
during operations.
Category(ies) of users Industrial
Trained professional
Pack sizes and packaging material — Pails: 25L nominal, material of construction is high density
polyethylene.
— Drums: 220L nominal, material of construction is high density
polyethylene.
— IBC (intermediate bulk container): 1 000L nominal, material of
construction is high density polyethylene.
— Bulk tank truck: 28 MT max. gross weight, material of
construction is stainless steel.
— Bulk ISO tank: 20 MT max. gross weight, material of
construction is stainless steel.
— Offshore-suitable drums: 200L, material of construction is high
density polyethylene.
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— Offshore-suitable semi-bulk containers: 1 000L, material of
construction is stainless steel.
— Offshore-suitable containers: 500 IG (2 273L), material of
construction is stainless steel.
— Offshore-suitable containers: 1 000 IG (4 546L), material of
construction is stainless steel.
4.19.1. Use-specific instructions for use
Dose 50 to 1 000 g glutaraldehyde per m3produced water.
The dose and frequency strongly depend on the formulation and intended use of the matrix to which the
preservative is added. Therefore, the user shall determine dosage requirements for their specific matrix/system to
be preserved. The lowest effective dose shall be used. If needed, consult the authorisation holder of the
preservative product.
4.19.2. Use-specific risk mitigation measures
If discharged into seawater 0,2 mg/L glutaraldehyde must not be exceeded in the produced water for recycling.
This concentration can be achieved either by slow release and/or long retention times resulting in degradation of
glutaraldehyde and/or by dilution and/or by addition of sodium bisulphite at pH 5 (release after at least 20
minutes) or addition of sodium hydroxide to pH 12 (release after at least 10-16 hours) as degradation aids.
Produced water for recycling containing up to 750 mg/L glutaraldehyde can be used for re-injection. Run lab test
to determine the soiling dependent dosage and degradation rate in use.
When applied onshore, preserved fluids must be recycled or disposed of as hazardous waste. If release to the sewer
is unavoidable, the concentration shall not exceed 1 mg glutaraldehyde/L.
4.19.3. Where specific to the use, the particulars of likely direct or indirect effects, first aid instructions and emergency measures to
protect the environment
See general directions for use.
4.19.4. Where specific to the use, the instructions for safe disposal of the product and its packaging
See general directions for use.
4.19.5. Where specific to the use, the conditions of storage and shelf-life of the product under normal conditions of storage
See general directions for use.
5. GENERAL DIRECTIONS FOR USE OF THE META SPC 3
5.1. Instructions for use
See use specific instructions for use.
5.2. Risk mitigation measures
Disconnecting the product container manually:
The use of eye protection (chemical goggles) consistent with EN 166 or equivalent during handling of the product
is mandatory.
Wear a protective coverall [type 3or type 4] consistent with EN 14605 or equivalent.
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
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Use of respiratory protective equipment (RPE) providing a protection factor of 40 is mandatory. Providing at least
a powered air purifying respirator with helmet/hood/mask (TH3 (EN 12941or equivalent)/TM3 (EN 12942 or
equivalent)), or a full-face mask (EN 136 or equivalent) with particle filter P3 (EN 12083 or equivalent).
During tank cleaning & maintenance:
Wear a protective coverall [type 3or type 4] consistent with EN 14605 or equivalent.
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
Use of respiratory protective equipment (RPE) providing a protection factor of 10 is mandatory. Providing at least
a powered air purifying respirator with helmet/hood/mask (TH1 (EN 12941 or equivalent)/TM1 (EN 12942 or
equivalent)), a half/quarter mask (EN 140 or equivalent) or a full-face mask (EN 136 or equivalent) with particle
filter P2 (EN 12083 or equivalent) each or a filtering half mask (FFP2, EN 149 or equivalent).
Draining, cleaning and maintenance of closed re-circulating system:
Wear a protective coverall [type 3or type 4] consistent with EN 14605 or equivalent.
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
Loading/unloading slurry tanks:
Wear protective chemical resistant gloves meeting the requirements of European Standard EN 374 or equivalent
during product handling phase (glove material to be specified by the authorisation holder within the product
information).
The product must be poured using an automated dosing system.
Ensure that application is carried out in well-ventilated areas.
Use engineering controls to maintain airborne level below exposure limit requirements or guidelines.
Use an approved air-purifying or positive-pressure supplied-air respirator depending on the potential airborne
concentration.
Regarding the personal protective equipment listed in this section, this is without prejudice to the application by
employers of Council Directive 98/24/EC and other Union legislation in the area of health and safety at work.
See section 6 for the full references to this act and the European Standards.
5.3. Particulars of likely direct or indirect effects, first aid instructions and emergency measures to protect
the environment
IF INHALED: Move to fresh air and keep at rest in a position comfortable for breathing.
If symptoms: Immediately call 112/ambulance for medical assistance.
IF SWALLOWED: If conscious, immediately rinse mouth. Give something to drink, if exposed person is able to
swallow. Do NOT induce vomiting. Call 112/ambulance for medical assistance.
IF ON SKIN: Immediately wash skin with plenty of water. Thereafter take off all contaminated clothing and wash it
before reuse. Continue to wash the skin with water for 15 minutes. Call a POISON CENTRE or a doctor. If skin
irritation or rash occur: Get medical advice.
IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing for at least 15 minutes. Call 112/ambulance for medical assistance.
118/121 ELI: http://data.europa.eu/eli/reg_impl/2025/1906/ojEN
OJ L, 30.9.2025
Information to Healthcare personnel/doctor:
Immediately initiate life support measures, thereafter call a POISON CENTRE.
Environmental precautions: Prevent from entering into soil, ditches, sewers, waterways and/or groundwater.
Spills or discharge to natural waterways is likely to kill aquatic organisms.
Personal precautions, protective equipment and emergency procedures in case of accidental release
measures:Evacuate area. Keep upwind of spill. Ventilate area of leak or spill. Only trained and properly protected
personnel must be involved in clean-up operations. Use appropriate safety equipment.
Methods and materials for containment and cleaning up: Avoid making contact with spilled material, since
glutaraldehyde will be absorbed by most shoes. When cleaning up a spill always wear the appropriate protective
equipment, including respiratory protection, gloves, protective clothing and eye protection. A self-contained
breathing apparatus or respirator and absorbents may be necessary, depending on the size of the spill and the
adequacy of ventilation.
Small spills: Wear the correct protective equipment including gloves and protective clothing and cover the liquid
with absorbent material. Collect and seal the material and the dirt that has absorbed the spilled material in
polyethylene bags and place in a drum for transit to an approved disposal site. Rinse away the remaining spilled
material with water to reduce odour, and discharge the rinsate into a municipal or industrial sewer, not into a
natural waterway.
Large spills: In case of nasal and respiratory irritation, vacate the room immediately. Personnel cleaning up should
be trained and equipped with a self-contained breathing apparatus, or an officially approved or certified full-face
respirator equipped with an organic vapor cartridge, glove, and clothing impervious to glutaraldehyde, including
rubber boots or shoe protection. Deactivate with sodium bisulfite (2-3 parts (by weight) per part of
glutaraldehyde), collect the neutralized liquid and place in a drum for transit to an approved disposal site.
5.4. Instructions for safe disposal of the product and its packaging
The biocidal product, when being disposed of in its unused and uncontaminated state should be treated as a
hazardous waste according to EC Directive 2008/98/EC.
Deactivate with sodium bisulfite (2-3 parts (by weight) per part of glutaraldehyde), collect the neutralized liquid
and place in a drum for transit to an approved disposal site. If the concentration of glutaraldehyde is up to 2%,
deactivate by the addition of aqueous sodium hydroxide solution in an amount sufficient to maintain a pH of 12
for 8 h, followed by neutralization (i.e. neutral pH) with the careful addition of an inorganic acid e.g. hydrochloric
acid, before disposal by appropriate means. Any disposal practices must be in compliance with all national and
provincial laws and any municipal or local by-laws governing hazardous waste. Do not dump into any sewers, on
the ground, or into any body of water. Avoid release to the environment. High-temperature incineration is an
acceptable practice glutaraldehyde burns cleanly to carbon dioxide and water.
Containers used to store glutaraldehyde solutions are non refillable. Do not reuse or refill the containers.
Containers should be triple or pressure rinsed with water promptly after they are emptied. They can then be
offered for recycling or reconditioning for biocidal products, or they can be punctured and disposed of in a
sanitary landfill or by other procedures approved by national and local authorities. Send waste liquid from rinsing
of used containers to an approved waste handling facility.
5.5. Conditions of storage and shelf-life of the product under normal conditions of storage
Do not store in and avoid contact with aluminum, carbon steel, copper, mild steel, iron. Avoid contact with
amines, ammonia, strong acids, strong bases, strong oxidizers.
Store at temperatures <40 °C
Shelf life:
metaSPC GA 13.5: 12 months in HDPE and stainless steel
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 119/121EN
OJ L, 30.9.2025
6. OTHER INFORMATION
The full titles of the EN standards referenced in the Risk mitigation measures are:
EN ISO 374 – Protective gloves against dangerous chemicals and micro-organisms
EN 166 – Eye protection against chemicals.
EN 14605 – Protective clothing against liquid chemicals – Performance requirements for clothing with liquid-tight
(Type 3) or spray-tight (Type 4) connections, including items providing protection to parts of the body only (Types
PB [3] and PB [4]).
EN 12941 - Respiratory protective devices - Powered filtering devices incorporating a loose fitting respiratory
interface - Requirements, testing, marking
EN 12942 – Respiratory protective devices - Powered filtering devices incorporating full face masks, half masks or
quarter masks - Requirements, testing, marking
EN 136 - Respiratory protective devices. Full face masks. Requirements, testing, marking
EN 140 - Respiratory protective devices - Half masks and quarter masks - Requirements, testing, marking
EN 149 - Respiratory protective devices - Filtering half masks to protect against particles - Requirements, testing,
marking
EN 12083 - Respiratory protective devices – Filters with breathing hoses, (Non-mask mounted filters) – Particle
filters, gas filters, and combined filters – Requirements, testing, marking
Council Directive 98/24/EC of 7 April 1998 on the protection of the health and safety of workers from the risks
related to chemical agents at work (fourteenth individual Directive within the meaning of Article 16(1) of
Directive 89/391/EEC) (OJ L 131, 5.5.1998, p. 11).
With respect to the “Category (ies) of users” note: “Professionals (including industrial users) means trained
professionals if this is required by national legislation.
7. THIRD INFORMATION LEVEL: INDIVIDUAL PRODUCTS IN THE META SPC 3
7.1. Trade name(s), authorisation number and specific composition of each individual product
Trade name(s) SolenisTM Market area: EU
IS2544
MICRO
BIOCIDE
AQU Market area: EU
CAR(TM)
GA 135
Water
Treatment
Microbio
cide
Preventol® Market area: EU
GA 135
SANIPOL® Market area: EU
PG 135
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Biosperse™ Market area: EU
2544
MICRO
BIOCIDE
Dab 423 Market area: EU
Ferrocid® Market area: EU
4507
GABOTEC Market area: EU
G 13.5% B
GABOTEC Market area: EU
G 13.5%
B6
GLUT- Market area: EU
ACTIVE
13,5 IOB
GLUT- Market area: EU
ACTIVE
13,5-A IOB
GLUT- Market area: EU
ACTIVE
13,5-B IOB
HYDREX Market area: EU
7519
SANITER Market area: EU
422
Spectrum™ Market area: EU
RX7813
MICRO
BIOCIDE
Warosit Market area: EU
249
Warostat Market area: EU
3249
Authorisation number EU-0030162-0003 1-3
Common name IUPAC name Function CAS number EC number Content (%)
Glutaraldehyde 1,5-pentanedial Active 111-30-8 203-856-5 13,6 % (w/w)
substance
ELI: http://data.europa.eu/eli/reg_impl/2025/1906/oj 121/121