(NH4) 2HPO4 , DAP , tech.grade and food grade , Assay:99.0 %min , P2O5: 53.0 %min , N:20.8 %min , PH : 7.8-8.2 Diammonium phosphate (DAP) Chemical ... :Used as fire-extinguishing agent for fabric, woods, paper. For food grade, it is mainly used as ferment agent, nourishment , and so ...