CASR |
: | 7782-85-6 |
Molecular Formula |
: | Na2HPO4.7H2O |
Molecular Weight |
: | 268.07 |
| Specifications | |
|---|---|
| Description: | Colorless or white, granular or caked salt. |
| Solubility: | Freely soluble in water; very slightly soluble in alcohol. |
| Identification A (Sodium): | A dense precipitate should form. |
| Identification B (Phosphate 1): | With silver nitrate solution neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide. |
| Identification B (Phosphate 2): | With ammonium molybdate solution, acidified solution should yield a yellow precipitate that should be soluble in 6 N ammonium hydroxide. |
| Appearance of solution: | Solution S should be clear and colourless. |
| Reducing substances: | The Colour of the permanganate should not be completely discharged. |
| Insoluble Substances: | NMT 0.4% |
| Chlorides: | NMT 0.06% |
| Sulfates: | NMT 0.2% |
| Arsenic: | NMT 16 ppm |
| Iron: | NMT 20 ppm |
| Loss on drying at 130°C: | 43.0%-50.0% |
| pH: | 8.7-9.3 |
| Heavy metal (as Pb): | NMT 10 ppm |
| Assay (on dried basis): | 98.0%-100.5% |
| Bacterial endotoxins: | NMT 2.5 IU/g |
| Total Microbial Count: | NMT 100 cfu/g |
| Total Yeast and mold count: | NMT 100 cfu/g |
