Read the ISO 22241 Specifications for AdBlue®
Aqueous Urea Solution 32 Diesel Engine Fluid, more simply AUS 32 DEF, or better yet AdBlue® is manufactured to meet ISO 22241 standards in order to be compliant to be used in modern diesel engines.
AdBlue® is a registered trademark of German Association of the Automobile Industry (VDA), our guide to explains more about the emissions-reducing fluid.
ISO 22241 Specifications: Physical and chemical properties of AdBlue®
In order to be used in Euro 6 diesel engines, AdBlue® needs to meet the BS ISO 22241 specifications, which it does by having the required physical properties and chemical properties. The table below illustrates the properties AdBlue® needs to have.
|Appearance||Colourless Liquid with slight ammonia odour|
|Flash point||not applicable (non-flammable)|
|Viscosity at 20°C||1.4||1.4||mPa.s|
|Density at 20°C||1.087||1.093||g/cm3|
|Refracting index at 20°C||1.3814||1.3843|
|Alkalinity as NH3||0.2||%|
|Insolubles 20 mg/kg||20||mg/kg|
|Aldehyde 5 mg/kg||5||mg/kg|