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): | A dense precipitate should form. |
Identification B (By Chemical test 1): | With silver nitrate solution neutral solution should yield yellow precipitate that soluble in 2N nitric acidand 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. |
Assay (Dried substance): | 98.0% - 100.5% (Na2HPO4) |
Insoluble Substances: | NMT 0.4% |
Chlorides: | NMT 0.06% |
Sulfate (SO4): | NMT 0.2% |
Arsenic (As): | NMT 16ppm |
Loss on drying,130°C: | 43.0% - 50.0% |