What is Diesel Exhaust Fluid and what are its components?

Answer 1

Diesel Exhaust Fluid is an aqueous solution of Urea and used in transportation to reduce the amount of nitrogen oxides emitted into the air by diesel engines.

Composition of Diesel Exhaust Fluid (DEF) - 32.5% urea and 67.5% de-ionized water.

Answer 2

32.5% urea and 67.5% de-ionized water