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    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    ISO 22241 is the international standard ensuring the quality, handling, and storage of AdBlue (Diesel Exhaust Fluid/DEF), a 32.5% urea solution used in SCR systems to reduce NOx emissions. It guarantees the fluid is pure (free from impurities like heavy metals) and has the correct concentration to prevent catastrophic, expensive damage to catalytic converters. 
    Key Aspects of ISO 22241 (AdBlue / AUS 32): 
    • Composition: 32.5% high-purity urea and 67.5% deionized water.
    • Density:
      1.0870
      --
      1.0930
      g/cm3
       at 20°C.
    • Refractive Index:
      1.3814
      --
      1.3843
       at 20°C.
    • Contaminant Limits:
      Stringent limits on aldehyde (
      ≤5
      mg/kg
      ), biuret (
      ≤0.3
      %
      ), and other impurities to protect sensitive catalysts.
    • Purpose: Ensures proper operation of Selective Catalytic Reduction (SCR) technology in modern diesel engines. 
    ISO 22241 Parts Breakdown: 
    1. ISO 22241-1: Quality requirements.
    2. ISO 22241-2: Test methods for evaluating quality.
    3. ISO 22241-3: Handling, transportation, and storage.
    4. ISO 22241-4: Refilling interface. 
    Using ISO 22241 compliant AdBlue is crucial because improper fluids can lead to premature SCR system failure. It is recommended to check that any DEF product explicitly states it meets this standard. 
    • ISO 22241-1:2019(en), Diesel engines — NOx reduction agent ...
      Introduction. In order to protect the environment, keeping the air quality as clean as possible, exhaust emissions regulations aro...
      ISO - International Organization for Standardization
    • Diesel Exhaust Fluid (AdBlue) Testing - Intertek
      Diesel Exhaust Fluid (AdBlue®/DEF) quality control testing per ISO 22241-1. Diesel Exhaust Fluid (DEF) is often referred to as AdB...
      Intertek
    • Why ISO 22241 Compliance Matters for AdBlue Production Machinery
      ISO 22241 is a multi-part international standard developed to ensure the quality and handling of AdBlue (or AUS 32 – Aqueous Urea ...
      Atmosfer Makina
    Show all
    • ISO 22241-1:2019(en), Diesel engines — NOx reduction agent ...
      Introduction. In order to protect the environment, keeping the air quality as clean as possible, exhaust emissions regulations aro...
      ISO - International Organization for Standardization
    • Diesel Exhaust Fluid (AdBlue) Testing - Intertek
      Diesel Exhaust Fluid (AdBlue®/DEF) quality control testing per ISO 22241-1. Diesel Exhaust Fluid (DEF) is often referred to as AdB...
      Intertek
    • Why ISO 22241 Compliance Matters for AdBlue Production Machinery
      ISO 22241 is a multi-part international standard developed to ensure the quality and handling of AdBlue (or AUS 32 – Aqueous Urea ...
      Atmosfer Makina
    • Why AdBlue ISO 22241 matters for your fleet - LinkedIn
      What ISO 22241 is designed to protect. ISO 22241 is the international standard governing the purity, testing, handling and refilli...
      LinkedIn
    • AdBlue® Guide - What is it & How long does it last? - Crown Oil
      Physical and chemical properties of AdBlue. ... In order to be used in diesel engines, AdBlue® must meet the ISO 22241 specificati...
      Crown Oil
    • Diesel Exhaust Fluid (AdBlue) Testing - ISO 22241 - Measurlabs
      Diesel exhaust fluid (e.g. AdBlue) testing according to ISO 22241. Diesel exhaust fluid (DEF) is an additive used in diesel-powere...
      Measurlabs
    • Understanding AdBlue Quality Standards - Atmosfer Machinery
      ISO 22241: The International Standard for AdBlue The most widely recognized standard for AdBlue is ISO 22241, which specifies the ...
      Atmosfer Makina
    • AdBlue (DEF) Guide | ISO 22241, SCR System & FAQ - Basekim
      AdBlue is a clear liquid made of 32.5% high-purity urea and 67.5% deionized water. Unlike fertilizer-grade urea, this product foll...
      Basekim
    • Diesel Exhaust Fluid (AdBlue) Testing - ISO 22241 - NANOLAB
      TS ISO 22241 Standards: Quality Criteria for AdBlue AdBlue analysis is based on two main standards: TS ISO 22241-1:2019: specifies...
      NANOLAB
    • Diesel Owners: Learn This About AdBlue/DEF Before It's Too Late ...
      To reduce AdBlue-related issues, using high-quality AdBlue that meets ISO 22,241 standards from reputable suppliers is important. ...
      1m
      YouTube·Car Expertly
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    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 › conf...
    Reddit
    https://www.reddit.com › drivingUK › comments › conf...
    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-qual...
    Atmosfer Makina
    https://atmosfermakina.com › understanding-adblue-qual...
    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

    Why ISO 22241 Compliance Matters for AdBlue Production ...


    Atmosfer Makina
    https://atmosfermakina.com › why-iso-22241-complian...
    Atmosfer Makina
    https://atmosfermakina.com › why-iso-22241-complian...
    The goal of ISO 22241 is to maintain the chemical integrity of AdBlue and prevent contamination that can impair SCR systems in diesel vehicles. Why Compliance ...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.
    $370.36 · 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.

    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

    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

    Why AdBlue ISO 22241 matters for your fleet


    LinkedIn · Fleetmaxx Solutions ltd
    2 reactions · 4 months ago
    LinkedIn · Fleetmaxx Solutions ltd
    2 reactions · 4 months ago
    ISO 22241 is the international standard governing the purity, testing, handling and refilling systems for AdBlue. When a product meets this ...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
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