- Open : 9am - 5pm (Mon - Sat)
- Unit 8, South Staffs Terminal, Lynn Lane, Shenstone, Staffs, WS14 OED
AdBlue®, also known as AUS 32 DEF, is an additive that is used in diesel engine exhaust systems to neutralise toxic NOx emissions. It uses a simple procedure of selective catalytic reduction (SCR) to reduce the harmful emission of Nitrogen Oxides. It is a registered trademark that is owned by the German Association of the Automobile Industry.
After Euro 6 guidelines, it has become an essential component of every diesel vehicle to ensure its compliance. However, AdBlue® needs to meet strict specifications under ISO 22241 standards to ensure it is reliable and safe for diesel engines.
Parameter | Maximum Value | Minimum Value | Unit |
Appearance | Colourless Liquid with a slight ammonia odour | – | |
Freezing point | -11°C | -11°C | °C |
Boiling point | 100°C | 100°C | °C |
Basicity | 10 | 9 | pH |
Water solubility |
| 100 | g/l |
Viscosity at 20°C | 1.4 | 1.4 | mPa.s |
Urea Content | 33.2 | 31.8 | % |
Density at 20°C | 1.093 | 1.087 | g/cm3 |
Refracting index at 20°C | 1.3843 | 1.3814 | – |
Alkalinity as NH3 | 0.2 | – | % |
Biuret | 0.3 | – | % |
Insolubles | 20 | – | mg/kg |
Aldehyde | 5 | – | mg/kg |
Phosphate (PO4-3) | 0.5 | – | mg/kg |
Calcium | 0.5 | – | mg/kg |
Iron | 0.5 | – | mg/kg |
Aluminium | 0.5 | – | mg/kg |
Magnesium | 0.5 | – | mg/kg |
Sodium | 0.5 | – | mg/kg |
Potassium | 0.5 | – | mg/kg |
Copper | 0.2 | – | mg/kg |
Zinc | 0.2 | – | mg/kg |
Chromium | 0.2 | – | mg/kg |
Nickel | 0.2 | – | mg/kg |