AUS 32 and AUS 40: what is the difference?
Sep 15, 2026 · Chemical Liquids · 2 min read
Sample article shown for design review only.
AdBlue® is a high-purity aqueous solution containing 32.5% high-purity urea and 67.5% demineralized water. It is injected into exhaust gas through the selective catalytic reduction system to help convert nitrogen oxides into nitrogen and water.
We supply AUS 32 and AUS 40. AUS 40 is the premium grade offered for marine applications.
Important: AdBlue® is filled into a dedicated tank and is never added to diesel fuel.
