Introduction to Monoammonium Phosphate مونو آمونیوم فسفات — monoammonium phosphate, abbreviated MAP, with the chemical formula NH4H2PO4 — is a water-soluble ammonium phosphate salt produced by the reaction of ammonia with phosphoric acid in the molar ratio of one to one. It is one of the most important phosphate fertilizers in global agriculture, providing both nitrogen in the...