Adblue is a clear liquid soluction which consist of demineralize water 67.5% and automative urea 32.5% (also called carbamide) Urea is an organic compound and it is injected into the exhaust gas to reduce the very harmful NOx (nitrogen oxide) emissions of the diesel engines. Adblue is used to meet the Euro5 and Euro6 emission standards, as stated above Adlue helps to reduce the NOx (Nitrogen oxide) emissions because it is injected into the exhaust emissions of an engine running on diesel. it is therefore good for our environment, it makes sure NOx is transformed into harmless products like nitrogen and water vapour. In otherwards Adblue is an exhaust fluid developed for engines running on diesel and equipped with SCR system (Selective Catalytic Reduction ).