CASR |
: | 10028-24-7 |
Molecular Formula |
: | Na2HPO4.2H2O |
Molecular Weight |
: | 177.99 |
| Specifications | |
|---|---|
| Appearance/Description: | White or almost white powder or colorless crystals. |
| Solubility: | Freely soluble in water; practically insoluble in ethanol (96%) |
| Identification (By chemical test): | Solution should be slightly alkaline |
| Identification (By Loss on drying): | 19.5%- 21.0% |
| 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 |
| Assay (on dry basis): | 98.0%- 100.5% |
| Assay (Dried substance): | 98.0% -101.0% (Na2HPO4) |
| Insoluble Substances: | NMT 0.4% |
| Appearance of solution: | Clear and colorless solution |
| Reducing substances: | The color of the permanganate should not completely discharge |
| Monosodium Phosphate: | NMT 2.5% |
| Chlorides: | NMT 400ppm |
| Sulphate (SO4): | NMT 0.1% |
| Arsenic (As): | NMT 16 ppm |
| Iron(Fe): | NMT 40 ppm |
| Loss on drying,130°C: | 19.5% - 21.0% |
