CASR |
: | 7782-85-6 |
Molecular Formula |
: | Na2HPO4.7H2O |
Molecular Weight |
: | 268.07 |
| Specifications | |
|---|---|
| Description: | Colorless or white, granular or caked salt. Effloresces in warm, dry air. Its solutions are alkaline to phenolphthalein. A 0.1M solution should have a pH about 9. |
| Solubility: | Freely soluble in water; very slightly soluble in alcohol |
| Identification A (By Chemical test 1): | A dense precipitate should form |
| Appearance of solution: | Clear and colourless solution |
| Identification B (By Chemical test 1): | With silver nitrate solution neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide |
| Identification B (By Chemical test 2): | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate that should soluble in 6N ammonium hydroxide. |
| Water insoluble matter: | NMT 0.4% |
| pH(5% aq soln): | 8.7-9.3 |
| Chloride(Cl): | NMT 0.0200% |
| Sulphate(SO4): | NMT 0.0500% |
| Iron(Fe): | NMT 0.002% |
| Arsenic (As): | NMT 0.0002% |
| Sodium dihydrogen phosphate: | NMT 1.7% |
| Substance reducing permanganate: | Passes test |
| Loss on drying at 130°C: | 45.0-49.0% |
| Total aerobic microbial count: | NMT 100 CFU/gm |
| Total Yeast and mold count: | NMT 100 CFU/gm |
| Bacterial endotoxins: | NMT 2.5 IU/gm |
