Commodity:Di Ammonium Phosphate Specification (food grade): Purity: 98% min P2O5: 53% min N: 21% 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: 0.001max PH value: 8.0 8.2 Specification (technical grade): Purity: 98% min P2O5: 53% min N: 21% min Water insoluble: 0.1% max Water: 0.3% max PH value: 8.0 8.2