Diammonium Phosphate (DAP) Tech Grade Main content% ≥ 98.0 Phosphorus pentoxide% ≥ 53.0 Nitrogen, as N % ≥ 20.8 PH value of 1% solution 7.8-8.2 Moisture % ≤ 0.2 Water insoluble % ≤ 0.10 . Food Grade Main content% ≥ 98.0 Phosphorus pentoxide% ≥ 53.0 Nitrogen, as N % ≥ 20.8 PH value of 1% solution 7.8-8.2 Moisture % ≤ 0.2 Heavy metals, as Pb % ≤ 0.001 Arsenic, as As% ≤ 0.0003 Fluoride as F% ≤ 0.005 Water insoluble % ≤ 0.10