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    These are results for ISO 22241 standard
    Search instead for ISO22241 standard
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    AI Overview
    ISO 22241 is the international standard governing the quality, testing, handling, transportation, and storage of Aqueous Urea Solution (AUS 32), commonly known as Diesel Exhaust Fluid (DEF) or AdBlue. It ensures the purity of the 32.5% urea solution necessary for Selective Catalytic Reduction (SCR) systems to reduce
    NOxcap N cap O sub x
    𝑁𝑂𝑥
     emissions in diesel engines. 
    Key Aspects of ISO 22241 
    • Quality Requirements (Part 1): Specifies physical and chemical properties, including a urea content of
      31.8
      %
      −33.2
      %
      (m/m)
      , a density of
      1.0870
      −1.0930
      g/cm3
       at
      20∘C20 raised to the composed with power C
      20∘C
      , and strict limits on contaminants like biuret, aldehydes, and trace elements (e.g., phosphorus, calcium).
    • Handling & Storage (Part 3): Defines best practices for storing and transporting DEF to avoid contamination, recommending specific materials (polyethylene, stainless steel) and procedures to prevent freezing or degradation.
    • Refilling Interfaces (Part 4 & 5): Standardizes nozzle interfaces to prevent improper filling. 
    Importance
    Compliant DEF protects delicate SCR catalysts from contamination and corrosion, ensuring efficient
    NOxcap N cap O sub x
    𝑁𝑂𝑥
     conversion. The American Petroleum Institute (API) requires this standard for its certification mark. 
    • INTERNATIONAL STANDARD ISO 22241-1
      The ISO 22241 series provides the specifications for quality characteristics, for handling, transportation and storage and for the...
      iTeh Standards
    • ISO 22241-1:2019 - Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements
      AUS 32 is an aqueous urea solution that is used in selective catalytic reduction (SCR) converter systems in diesel engines. SCR co...
      ISO - International Organization for Standardization
    • American Petroleum Institute | API | Diesel Exhaust Fluid (DEF)
      The program's standards are published by the International Organization for Standardization (ISO). To be licensed to display the A...
      American Petroleum Institute | API
    • DEF and the ISO 22241 Standard
      Jan 15, 2016 — The ISO 22241 standard covers best practices for handling, transporting, and storing diesel exhaust fluid (DEF). The standard ensu...
      Thunder Creek Equipment
    • Why is the AdBlue ISO 22241 important? - Fleetmaxx Solutions
      Nov 28, 2025 — ISO 22241 is the international standard that governs the manufacture, chemical composition, testing, handling and refilling system...
      Fleetmaxx Solutions
    • ISO 22241 Diesel Engines — NOx Reduction Agent AUS 32 — Quality Requirements
      The standard outlines the requirements for the purity, concentration, and physical properties of AUS 32. The standard is important...
      Analytik Jena
    • What Does ISO 22241 Compliant Mean?
      Mar 31, 2022 — The standard also states that all materials in direct contact with DEF must be compatible with diesel exhaust fluids. This include...
      Guangzhou EverBlue Technology Co.,Ltd.
    • INTERNATIONAL STANDARD ISO 22241-1
      The ISO 22241 series provides the specifications for quality characteristics, for handling, transportation and storage and for the...
      iTeh Standards
    • ISO 22241-1:2019 - Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements
      AUS 32 is an aqueous urea solution that is used in selective catalytic reduction (SCR) converter systems in diesel engines. SCR co...
      ISO - International Organization for Standardization
    • American Petroleum Institute | API | Diesel Exhaust Fluid (DEF)
      The program's standards are published by the International Organization for Standardization (ISO). To be licensed to display the A...
      American Petroleum Institute | API
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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
    This document specifies the quality characteristics of the NOx reduction agent AUS 32 (aqueous urea solution) which is needed to operate selective catalytic ...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
    9 pages
    People also ask
    What is the difference between ISO 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 ISO 22241 code?
    ISO 22241 is the international standard that governs the manufacture, chemical composition, testing, handling and refilling systems for AdBlue (also known chemically as Diesel Exhaust Fluid, or DEF).Nov 28, 2025

    Why is the AdBlue ISO 22241 important? - Fleetmaxx Solutions


    Fleetmaxx Solutions
    https://www.fleetmaxxsolutions.co.uk › news › adblue-is...
    Fleetmaxx Solutions
    https://www.fleetmaxxsolutions.co.uk › news › adblue-is...
    Do 2026 diesel trucks require DEF?
    ' On March 27, 2026, the EPA announced new guidance to remove the Diesel Exhaust Fluid sensor requirement for all diesel equipment in an action that officials say will save Americans 'countless hours of lost time and productivity.Mar 31, 2026

    ICYMI: EPA's New Guidance Removes Requirement for Diesel ...


    EPA
    https://www.epa.gov › newsreleases › icymi-epas-new-gu...
    EPA
    https://www.epa.gov › newsreleases › icymi-epas-new-gu...
    Can I drive without AdBlue?
    Technically, it's safe to drive to a refueling station if you still have AdBlue left, but if you completely run out, the vehicle will eventually prevent you from driving to avoid damaging the engine. It's essential to top up the AdBlue as soon as possible to avoid these issues.Feb 25, 2026

    What is AdBlue? Why does your car need it? | RAC Drive


    RAC
    https://www.rac.co.uk › drive › advice › emissions › adb...
    RAC
    https://www.rac.co.uk › drive › advice › emissions › adb...

    Web results

    NOx reduction agent AUS 32 - ISO 22241-1:2019


    ISO - International Organization for Standardization
    https://www.iso.org › standard
    ISO - International Organization for Standardization
    https://www.iso.org › standard
    This document specifies the quality characteristics of the NOx reduction agent AUS 32 (aqueous urea solution) which is needed to operate selective catalytic ...Read more
    CHF 44.00

    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

    DEF and the ISO 22241 Standard


    Thunder Creek Equipment
    https://thundercreek.com › resources › news › def-and-t...
    Thunder Creek Equipment
    https://thundercreek.com › resources › news › def-and-t...
    Thunder Creek Equipment's DEF delivery solutions meet the ISO 22241 standard for transporting and storing diesel exhaust fluid (DEF).Read more

    DEF Specifications: ISO 22241


    Fluid Life
    https://www.fluidlife.com › resource-center › documents
    Fluid Life
    https://www.fluidlife.com › resource-center › documents
    Jul 6, 2022 — This table outlines the specific physical and chemical properties Diesel Exhaust Fluid (DEF) is required to have according to ISO 22241 ...Read more

    Diesel Exhaust Fluid (DEF)


    American Petroleum Institute | API
    https://www.api.org › products-and-services › diesel-ex...
    American Petroleum Institute | API
    https://www.api.org › products-and-services › diesel-ex...
    Diesel exhaust fluid marketers that have demonstrated that their products satisfy the requirements of the most recent and applicable edition of ISO 22241, ...Read more

    ISO 22241 Diesel Engines — NOx Reduction Agent AUS 32


    Analytik Jena
    https://www.analytik-jena.com › knowledge › standards
    Analytik Jena
    https://www.analytik-jena.com › knowledge › standards
    ISO 22241 is an international standard that specifies the quality characteristics of the NOx reduction agent AUS 32, commonly known as Diesel Exhaust Fluid (DEF) ...Read more

    ISO/FDIS 22241-1 Diesel engines — NOx reduction agent ...


    ISO - International Organization for Standardization
    https://www.iso.org › standard
    ISO - International Organization for Standardization
    https://www.iso.org › standard
    This document specifies the quality characteristics of the NOx reduction agent AUS 32 (aqueous urea solution) which is needed to operate selective catalytic ...Read more
    Images
    Custom ISO 22241 AdBlue® Diesel Exhaust Fluid For SCR System ...
    Custom ISO 22241 AdBlue® Diesel Exhaust Fluid For SCR System ...
    Guangzhou EverBlue Technology Co.,Ltd.
    DEF Specifications: ISO 22241 - Fluid Life
    DEF Specifications: ISO 22241 - Fluid Life
    Fluid Life
    ISO 22241 Compliant DEF Transfer Systems | Proformance Supply
    ISO 22241 Compliant DEF Transfer Systems | Proformance Supply
    Proformance Supply
    All images
    Show more images

    Web results

    What Does ISO 22241 Compliant Mean?


    Guangzhou EverBlue Technology Co.,Ltd.
    http://www.everbluesolution.com › blog › what-does-iso...
    Guangzhou EverBlue Technology Co.,Ltd.
    http://www.everbluesolution.com › blog › what-does-iso...
    Mar 31, 2022 — Compliance with ISO 22241 means that the DEF distributor you use must be designed to keep the diesel exhaust fluid pure and prevent damage to your engine.Read more
    People also search for
    Iso 22241 standard pdf
    ISO 22241 PDF
    ISO 22241 specifications
    ISO 22241-3
    ISO 22241 AdBlue
    ISO 22241 AdBlue pdf
    ISO 22241 vs 22241-1
    ISO 22241-2:2019

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