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, a registered trademark of the German Association of the Automotive Industry.

Several existing standards for urea for major vehicles are as follows ;

1. International Organization for Standardization

ISO 22241-1:2019 Diesel engines — NOx reduction agent AUS 32

ISO 22241-1:2006 specifies the quality characteristics of the NOx reduction agent AUS 32 (aqueous urea solution) which is needed to operate converters with selective catalytic reduction, so-called SCR (Selective Catalytic Reduction) converters, in motor vehicles with diesel engines. SCR converters are particularly suitable for selectively reducing the nitrogen oxide (NOx) emissions of diesel engines.

2. German Standard : DIN 70070-2005

Diesel engines - NO<(Index)x>-reduction agent AUS 32

3. Japan Standard : JIS K2247-3-2011

diesel engines -- nox reduction agent aus 32

4. China Standard: GB 29518-2013

Diesel engines NOx reduction agent - Aqueous urea solution (AUS 32)

The quality index standards of AUS32 (AdBlue /DEF ) spree for the above are consistent.

EverBlue Chemicals had achieved the ISO 9001 Certificate and our product had passed the ISO 22241 ,DIN 70070 and GB29518-2013 standard with 11 kinds of AdBlue package for you to choose.

For more details ,please feel free to contact us!