1 | Description | White granular salt.Effloresces in warm dry air.its solutions are alkaline to phenolphthalein TS, a 0.1 M solution having a pH of about 9. | Colorless or white, granular or caked salt. Effloresces in warm, dry air. Its solutions are alkaline to phenolphthalein TS, a 0.1 M solution having a pH of about 9. |
2 | Solubility | Passes | Freely soluble in water; very slightly soluble in alcohol. |
3 | Identification A (By Chemical test) | Complies | Gives positive test of Sodium |
4 | Identification B (By Chemical test) | Complies | Gives positive test of Phosphate |
5 | Assay (on dried basis) | 100.4% | 98.00%- 100.5% (Na2HPO4) |
6 | Insoluble Substances | 0.32% | NMT 20 mg (0.4%) |
7 | Chlorides | NMT 0.06% | 0.06% max |
8 | Sulphate (SO4) | NMT 0.2% | 0.2% max |
9 | Arsenic (As) | NMT 16ppm | 16ppm max |
10 | Heavy metals | NMT 20ppm | 20ppm max |
11 | Loss on drying,130°C | 43.02% | 43.0% - 50.0% |