Diesel Exhaust Fluid (DEF)

Diesel Exhaust Fluid (DEF), or Aqueous Urea Solution (AUS32), is a 32.5% urea solution used to reduce NOx emissions in diesel engines equipped with Selective Catalytic Reduction (SCR) systems. It is injected into the exhaust system, where it decomposes into ammonia, which the SCR catalyst then converts to water. DEF helps vehicles meet emission standards and improve air quality.

Specific properties:

• Aspect: Colorless clear liquid
• pH at 20°C: 7.5 - 9.5
• Melting range: -11 to -12°C
• Boiling range: > 100°C
• Viscosity at 25°C: approx. 1.4 mPas
• Density at 20°C: 1.087 – 1.093 g/cm³

 Technical Data Sheet and Safety Data Sheet:

• SDS - Aqueous Urea Solution 32% (DEF)
• TDS - Aqueous Urea Solution 32% (DEF)