What is def fluid made of?

DEF (Diesel Exhaust Fluid) is a non-toxic, colorless, odorless, and non-flammable fluid. It's primarily made up of two components:

• High-Purity Urea: DEF is approximately 32.5% high-purity, synthetically produced urea. This urea is specifically manufactured to meet the stringent purity standards required for Selective Catalytic Reduction (SCR) systems.

• Deionized Water: The remaining 67.5% of DEF is deionized water. This water is purified to remove minerals and other contaminants that could damage the SCR system or reduce its effectiveness. The purity of the water is crucial.