Industrially, three compounds are produced and utilized: ammonium dihydrogen phosphate, diammonium hydrogen phosphate and ammonium polyphosphate. The two hydrogen phosphates are obtained from ammonia and pure phosphoric acid. If the ammonia is added stepwise, wet-process acid can also be used.

Diammonium hydrogen phosphate has a noticeable partial pressure of ammonia at room temperature. The tendency of ammonium hydrogen phosphates to split off ammonia at high temperatures means that higher molecular weight ammonium polyphosphates cannot be produced using the hydrogen monophosphates analogously to sodium polyphosphates. Industrially, they are produced in an ammonia atmosphere from urea and phosphoric acid, or diammonium phosphate and diphosphorus(Ⅴ) oxide.