Chemical formula:(nh4)2hpo4 Cas no.: 7783-28-0 Diammonium phosphate specification: (dap 21-53-0), diammonium phosphate Appearance: white crystal Diammonium phosphate: 98%min Nitrogen(n): 21%min (p2o5): 53%min Water insoluble: 0.1%max Moisture: 0.2%max . In pp/pe neutral bag, net weight: 25kg.