AdBlue® / DEF / AUS 32 is a fluid used to reduce exhaust emissions in diesel vehicles equipped with Selective Catalytic Reduction (SCR) systems. The main component of this product is liquid urea with a concentration of 32.5%, and it is designed to reduce harmful gases from diesel vehicles, specifically Nitrogen Oxides (NOx). When AdBlue is used properly, it converts NOx into nitrogen (N₂) and water (H₂O). The use of AdBlue complies with Euro 4, Euro 5, and Euro 6 emission standards.