Diammonium hydrogen phosphate is an inorganic phosphate, being the diammonium salt of phosphoric acid. It has a role as a fertilizer. It is an inorganic phosphate and an ammonium salt.
Diammonium phosphate (DAP; IUPAC name diammonium hydrogen phosphate; chemical formula (NH4)2HPO4) is one of a series of water-soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid.The compound occurs in the nature as the exceedingly rare mineral phosphammite.