Not all AdBlue is the same. To protect engines, emissions systems, and ensure compliance with the law, AdBlue must meet the ISO 22241 standard. This international quality standard defines the exact specifications for producing, storing, transporting, and using AdBlue. Using poor-quality or contaminated fluid can cause expensive damage and disrupt vehicle operation.

What is ISO 22241?

ISO 22241 is the official specification for Diesel Exhaust Fluid (DEF), known in Europe as AdBlue. It sets strict requirements for:

  • Composition: 32.5% high-purity urea and 67.5% deionised water.
  • Purity levels: Limits on trace metals, contaminants, and impurities.
  • Storage conditions: Guidelines on temperature and materials to avoid contamination.
  • Packaging and handling: Approved methods to maintain quality from production to end user.

Why Does It Matter?

  1. Protects Vehicle Systems
    AdBlue that doesn’t meet ISO 22241 can contain impurities such as calcium, iron, or copper. These can block the Selective Catalytic Reduction (SCR) system, damage injectors, and cause costly repairs.
  2. Ensures Legal Compliance
    Euro 6 and other emissions standards require vehicles to use certified AdBlue. Using non-compliant fluid risks failing emissions tests and, for fleets, may even result in penalties.
  3. Guarantees Performance
    High-quality AdBlue ensures the SCR system works efficiently, reducing harmful nitrogen oxide (NOx) emissions and keeping the vehicle operating smoothly.
  4. Prevents Downtime
    Contaminated or poor-quality fluid can trigger dashboard warnings, limp mode, or even prevent the vehicle from starting. Fleet operators risk unnecessary downtime if standards are not met.

How to Make Sure Your AdBlue is ISO 22241 Compliant

  • Buy only from reputable suppliers.
  • Look for ISO 22241 certification on packaging.
  • Store AdBlue in clean, sealed containers away from sunlight and extreme heat.
  • Never transfer AdBlue using equipment that has been in contact with fuel, oil, or other chemicals.

✅ In summary: The ISO 22241 standard guarantees that AdBlue is pure, reliable, and safe for your vehicle’s emission system. Choosing certified AdBlue is the only way to protect your engine, remain compliant, and avoid unnecessary repair costs.