M.H.C.V. Product AdBlue is the name used internationally for an additive developed for the chemical and motoring sectors. It's an extremely high purity, 32.5% aqueous solution of urea (minimum 31.8% - maximum 33.3%) that transforms nitrogen oxides into nitrogen (N 2 ) and water vapour (H 2 O) by means of chemical reduction. Content of various metals must not exceed 0.2 mg/kg for each of them in order not to contaminate the catalytic converter. The composition and quality standards are regulated by DIN 70070. Commercial Documentation - Eurocargo Euro 4 Page No. C.6