(1):NH4H2PO4 (2):Content: 98%,99% (3):White crystal powder,100%water soluble (4):Tech. ... Technical Specifications : No Specifications Industrial Grade Food Grade 1Main contents% ≥98.098.02Phosphorus pentoxide% ≥61.061.03Nitrogen, as N % ≥11.811 ... .4-4.85Moisture% ≤0.20.26Heavy metals, as Pb % ≤ 0.0017Arsenic, as As % ≤ 0.00038Fluoride as F % ≤ 0.0029Water insoluble % ≤0.100.10 Monoammonium Phosphate ...