CASR |
: | 10028-24-7 |
Molecular Formula |
: | Na2HPO4.2H2O |
Molecular Weight |
: | 177.99 |
Specifications | |
---|---|
Description: | 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 4ppm |
Iron(Fe): | NMT 40ppm |
Loss on drying,130°C: | 19.5 - 21.0% |