Commodity: Mono Ammonium Phosphate Specification (food grade): Purity: 98% min P2O5: 61% min N: 12% min Water insoluble: 0.1% max Water: 0.3% max Arsenic as As: 0.0003% max Fluoride as F: 0.005% max Heavy metal as Pb: 0.001 max PH value: 4.4 - 4.6 Specification (technical grade): Purity: 98% min P2O5: 61% min N: 12% min Water insoluble: 0.1% max Water: 0.3% max PH value: 4.4 - 4.6