CASR |
: | 7558-79-4 |
Molecular Formula |
: | Na2HPO4 |
Molecular Weight |
: | 141.96 |
| Specifications | |
|---|---|
| Appearance/Description: | White or almost White powder that readily absorbs moisture. |
| Solubility: | Freely soluble in water, insoluble in alcohol (ethanol 96%). |
| Identification (By chemical test): | Solution should slightly alkaline. |
| Identification (By Loss on drying): | Not more than 1.0% |
| Identification (Sodium): | A dense precipitate should form. |
| Identification (Phosphate 1): | With silver nitrate solution neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide. |
| Identification (Phosphate 2): | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate that should soluble in 6N ammonium hydroxide. |
| Identification (Phosphate 3): | A yellow colour should develop |
| Assay (on dry basis): | 98.0% - 100.5% |
| Assay (Dried substance): | 98.0% - 101.0% |
| Monosodium Phosphate: | NMT 2.5% |
| Insoluble Substances: | NMT 20 mg (NMT 0.4%) |
| Appearance of solution: | Solution should be clear and colourless. |
| Chlorides: | NMT 200ppm |
| Sulphate (SO4): | NMT 500ppm |
| Arsenic (As): | NMT 16 ppm |
| Reducing substances: | The colour of the permanganate should not be completely discharge |
| Iron(Fe): | NMT 20ppm |
| Loss on drying: | NMT 1.0% |
