AdBlue® is a diesel exhaust fluid used in modern trucks and cars that have a selective catalytic reduction system. Using AdBlue® in line with manufacturers' requirements and a catalytic converter reduces the level of oxides of nitrogen emitted from engines. It is widely used as a fuel additive.


Melting Point-11.7°C
Boiling Point103.9°C
Flash Point537.2°C
Density1.09 g/cc

Uses and Applications

Key applications

  • Automotive

Synonyms: Diesel Exhaust Fluid (DEF), Aqueous Urea Solution, AUS, Automotive Grade Urea Solution, DEF, Diesel Exhaust Fluid

Chemical Formula: CO(NH2)2. H2o

CAS Number: 57-13-6, 7732-18-5