Used as a high effective non-chloride N, P compound fertilizer in agriculture. 1 Main content%min 98.02 Phosphorus pentoxide%min 53.03 Nitrogen, as N %min 20.84 PH value of 1% solution 7.8-8.25 Moisture % max 0.26 Heavy metals, as Pb %max 0.0017 Arsenic, as As% max 0.00038 Fluoride as F% max 0.0059 Water insoluble % max 0.10