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    AI Overview
    ISO 22241 is the essential international standard for AdBlue (AUS 32), ensuring the 32.5% urea solution is high-purity to protect diesel SCR systems from contamination. It guarantees proper nitrogen oxide reduction, with key specifications covering composition (31.8–33.2% urea), density (
    1.0870
    –
    1.0930
    g/cm3
    @
    20∘C20 raised to the composed with power C
    20∘C
    ), and limits on impurities. 
    Key Aspects of ISO 22241: 
    • Purpose: Ensures consistent quality for Selective Catalytic Reduction (SCR) systems.
    • Composition: Defines AdBlue as
      32.5
      %
      high-purity urea and
      67.5
      %
      deionized water.
    • Structure: Comprises four parts: quality requirements (1), test methods (2), handling/transportation (3), and refilling interface (4).
    • Compliance: Protects vehicle catalysts, prevents sensor issues, and ensures Euro 4/5/6 emissions standards are met.
    • Storage: Requires storage in cool, dry areas, avoiding direct sunlight. 
    ISO 22241 Specifications: 
    • Urea Content: 31.8% – 33.2%
    • Density at
      20∘C20 raised to the composed with power C
      𝟐𝟎∘𝐂
      :
      1.0870 – 1.0930 g/cm³
    • Refractive Index at
      20∘C20 raised to the composed with power C
      𝟐𝟎∘𝐂
      :
      1.3814 – 1.3843
    • Alkalinity (
      NH3cap N cap H sub 3
      𝑵𝑯𝟑
      ):
      ≤0.2
      %
    • Biuret:
      ≤0.3
      %
    • Insoluble Matter:
      ≤20
      mg/kg
       
    Using AdBlue that meets this standard is crucial, as lower-quality fluids can cause expensive SCR system damage. 
    Show more

    Web results

    ISO 22241-1:2019(en), Diesel engines


    ISO - International Organization for Standardization
    https://www.iso.org › obp
    ISO - International Organization for Standardization
    https://www.iso.org › obp
    The ISO 22241 series provides the specifications for quality characteristics, for handling, transportation and storage and for the refilling interface as well ...Read more
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    People also ask
    What is the difference between AdBlue 22241 and 22241-1?
    ISO 22241 is the international standard for Adblue. ISO 22241-1 is the specific part of the standard that specifies the quality characteristics. Basically they are referring to the same ISO standard so are both fine. It's just that one is being a bit more specific about the part of the standard.Jun 23, 2025

    Confused about types of AdBlue : r/drivingUK - Reddit


    Reddit
    https://www.reddit.com › drivingUK › comments › con...
    Reddit
    https://www.reddit.com › drivingUK › comments › con...
    What is AdBlue ISO 22241?
    AUS 32 DEF (Aqueous Urea Solution 32 Diesel Engine Fluid), generally known as AdBlue®, is subjected to strict ISO 22241 specifications to ensure it is compliant to be used in the modern diesel engines.

    ISO 22241 AdBlue® Specifications - 123 Oil


    123oil.co.uk
    https://123oil.co.uk › Fuel Specifications
    123oil.co.uk
    https://123oil.co.uk › Fuel Specifications
    What is ISO 22241 quality standard?
    ISO 22241: The International Standard for AdBlue

    The most widely recognized standard for AdBlue is ISO 22241, which specifies the quality requirements for Diesel Exhaust Fluid (DEF). This standard ensures that the urea concentration in AdBlue remains consistent at 32.5%, with the remaining 67.5% being deionized water.

    Understanding AdBlue Quality Standards - Atmosfer Machinery


    Atmosfer Makina
    https://atmosfermakina.com › understanding-adblue-qu...
    Atmosfer Makina
    https://atmosfermakina.com › understanding-adblue-qu...
    What is the ISO standard for AdBlue?
    AdBlue® specifications

    Our AdBlue® meets ISO 22241 standards, making it the perfect match to go alongside your diesel supply. Take a look at the diesel exhaust fluid's full specifications below. *This specification is not a guarantee.

    AdBlue® (ISO 22241) Specifications - Nationwide Fuels


    Nationwide Fuels
    https://www.nationwidefuels.co.uk › fuel-specifications
    Nationwide Fuels
    https://www.nationwidefuels.co.uk › fuel-specifications

    Web results

    AdBlue® Specifications: ISO 22241


    Crown Oil
    https://www.crownoil.co.uk › fuel-specifications › adblu...
    Crown Oil
    https://www.crownoil.co.uk › fuel-specifications › adblu...
    Jun 30, 2021 — Aqueous urea solution 32.5%, more simply AUS 32 DEF, or AdBlue®, is manufactured to meet ISO 22241 standards to enable use in modern diesel ...Read more

    INTERNATIONAL STANDARD ISO 22241-1


    iTeh Standards
    https://cdn.standards.iteh.ai › samples › ISO-2224...
    iTeh Standards
    https://cdn.standards.iteh.ai › samples › ISO-2224...
    PDF
    The ISO 22241 series provides the specifications for quality characteristics, for handling, transportation and storage and for the refilling interface as well ...Read more
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    Web results

    Diesel Exhaust Fluid (AdBlue) Testing


    Intertek
    https://www.intertek.com › automotive › fuels-lubricants
    Intertek
    https://www.intertek.com › automotive › fuels-lubricants
    Thus, it is important to maintain quality standards as characterized in the ISO 22241-1 standard. Intertek provides a full range of prompt AdBlue®/DEF testing ...Read more

    Understanding AdBlue Quality Standards


    Atmosfer Makina
    https://atmosfermakina.com › understanding-adblue-qu...
    Atmosfer Makina
    https://atmosfermakina.com › understanding-adblue-qu...
    The most widely recognized standard for AdBlue is ISO 22241, which specifies the quality requirements for Diesel Exhaust Fluid (DEF).Read more

    Diesel Exhaust Fluid (AdBlue) Testing - ISO 22241


    Measurlabs
    https://measurlabs.com › products › adblue-testing-iso-...
    Measurlabs
    https://measurlabs.com › products › adblue-testing-iso-...
    This test package for diesel exhaust fluid is used to measure variables from urea content to alkalinity. Results are typically obtained in 3 weeks.
    $370.02 · In stock

    ISO 22241 AdBlue® Specifications - 123 Oil


    123oil.co.uk
    https://123oil.co.uk › Fuel Specifications
    123oil.co.uk
    https://123oil.co.uk › Fuel Specifications
    AdBlue® is used to neutralise harmful nitrogen oxides in the exhaust system of diesel engine vehicles. Read its full specifications to learn more.

    AdBlue (DEF) Guide | ISO 22241, SCR System & FAQ


    Basekim
    https://basekim.com › adblue-def-iso22241
    Basekim
    https://basekim.com › adblue-def-iso22241
    AdBlue is a clear liquid made of 32.5% high-purity urea and 67.5% deionized water. Unlike fertilizer-grade urea, this product follows the strict requirements of ...Read more

    ISO 22241 Manufacturers-Everadblu


    Guangzhou EverBlue Technology Co.,Ltd.
    http://www.everbluesolution.com › blog › iso-22241_bk
    Guangzhou EverBlue Technology Co.,Ltd.
    http://www.everbluesolution.com › blog › iso-22241_bk
    In the international standard defining DEF (ISO 22241), it is referred to as AUS 32 (aqueous urea solution 32%). DEF is also sold as AdBlue.Read more
    Images
    ISO 22241 | RAVENOL
    ISO 22241 | RAVENOL
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    Custom ISO 22241 AdBlue® Diesel Exhaust Fluid For SCR System ...
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    Adblue solution for Prista catalytic converters (ISO 22241-1
    Adblue solution for Prista catalytic converters (ISO 22241-1
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    Why is the AdBlue ISO 22241 important? - Fleetmaxx Solutions
    Why is the AdBlue ISO 22241 important? - Fleetmaxx Solutions
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    Custom ISO 22241 AdBlue® Urea Fluid For Diesel Engine 5L,ISO ...
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