1.NPK 21-53-0 2.Tech grade and 100% water soluble 3.low heavy metal Diammonium phoshphate( ... :(NH4)2HPO4, Molecular Weight:132.0, Appearance: white crystal,Assay:99%min,P2O5:53%min,N:21.0%min, pH:7 ... than before upon nitrification of the ammonium. It is incompatible with alkaline chemicals because its ammonium ion is more likely to convert ...