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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 (
@
), and limits on impurities.
Key Aspects of ISO 22241:
- Purpose: Ensures consistent quality for Selective Catalytic Reduction (SCR) systems.
- Composition: Defines AdBlue as high-purity urea anddeionized 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.
- Urea Content: 31.8% – 33.2%
- Density at : 1.0870 – 1.0930 g/cm³
- Refractive Index at : 1.3814 – 1.3843
- Alkalinity ():
- Biuret:
- Insoluble Matter:
Using AdBlue that meets this standard is crucial, as lower-quality fluids can cause expensive SCR system damage.
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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 › con...
Reddit
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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.
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
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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.
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
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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
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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
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https://atmosfermakina.com › understanding-adblue-qu...
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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
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https://measurlabs.com › products › adblue-testing-iso-...
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This test package for diesel exhaust fluid is used to measure variables from urea content to alkalinity. Results are typically obtained in 3 weeks.
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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
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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
