Complaint
Chemical formula: NaH2PO4 2H2O
Molecular weight: 120.005
Properties: White powder or white crystal, the melting point is 190 centigrade. It is soluble in water showing acidity. It decompounds sodium pyrophosphate anhydrous at 225-250 centigrade, and becomes sodium metaphosphate at 350-400 centigrade. It is slightly hygroscopic.
| SPECIFICATIONS | Standard | Results |
| NAH2PO4.2H2O % ≥ | 98.0 | 99.1 |
| Sulphates, as So4 % ≤ | 0.4 | 0.35 |
PH of 1% solution | 4.2-4.8 | 4.3 |
water insoluble % ≤ | 0.1 | 0.05 |
| Chloride(As Cl) % ≤ | 0.04 | 0.035 |
| Heavy metals, as Pb % ≤ | 0.05 | 0.046 |
| Fluoride, as F % ≤ | 0.005 | 0.0025 |
| Iron Fe % ≤ | 0.05 | 0.035 |
| ITEM | SPEC | RESULT |
| CONTENT(Na2HPO4.12H2O) | 98%MIN. | 99.5% |
| PH VALUE(10g/L) | 4.1-4.7 | 4.5 |
| INSOLUBLE MATTER IN WATER | 0..2%MAX. | 0.01% |
| HEAVY METALS,as Pb | 0.001%MAX | <0.001% |
| ARSENIC, as As | 0.0003%MAX | 0.0002% |
| CHLORIDES, as Cl | 0.05%MAX | 0.015% |
| FLUORIDE as F | 0.005%MAX | 0.002% |
| Fe | 0.05%MAX | 0.001% |
| Dry Reduction | 2.0%MAX | 0.06% |
| APPEARANCE | WHITE POWDER | WHITE POWDER |
