CASR |
: | 10028-24-7 |
Molecular Formula |
: | Na2HPO4.2H2O |
Molecular Weight |
: | 177.99 |
| Specifications | |
|---|---|
| Appearance: | white crystals/crystalline powder. |
| Solubility: | Soluble in water. practically insoluble in ethanol (96 per cent). |
| Identification (By chemical test): | Solution should be slightly alkaline |
| Identification (Sodium): | A dense precipitate should form |
| Identification (Phosphate 1): | A yellow precipitate that solution in 2N nitric acid and in 6N ammonium hydroxide should form. |
| Identification (Phosphate 2): | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate which should soluble in 6N ammonium hydroxide |
| Identification (Phosphate 3): | A yellow colour should develop |
| Appearance of solution: | Clear and colourless solution |
| Water insoluble matter: | NMT 0.3% |
| pH (5% aq soln): | 8.9 – 9.2 |
| Substances reducing permanganate: | The colour of the permanganate is not completely discharged |
| Sodium dihydrogen phosphate: | NMT 1.7% |
| Chloride (Cl): | NMT 0.005% |
| Sulphate (SO4): | NMT 0.02% |
| Arsenic (As): | NMT 0.0002% |
| Iron (Fe): | NMT 0.001% |
| Loss on drying at 130°C: | 19.5% - 21.0% |
| Assay (on dry basis): | 98.0% - 100.5% |
| Assay (Dried substance): | 98.0% - 101.0% (Na2HPO4) |
| Total aerobic microbial count: | NMT 100CFU/gm |
| Total combined molds and yeasts count: | NMT 100CFU/gm |
| Bacterial endotoxin test: | NMT 2.5 IU/gm |
