CASR |
: | 10049-21-5 |
Molecular Formula |
: | NaH2PO4.H2O |
Molecular Weight |
: | 137.99 |
| Specifications | |
|---|---|
| Appearance/Description: | Colorless crystals or a white crystalline powder. Its solutions are acid to litmus and effervesce with sodium carbonate. |
| Solubility: | Very soluble in water; very slightly soluble in ethanol (96%). practically insoluble in alcohol. |
| Identification (By chemical test): | Solution should be slightly acid. |
| Identification (Phosphate 1): | A neutral solution should yield yellow precipitate with silver nitrate solution 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 with ammonium molybdate solution which should soluble in 6N ammonium hydroxide. |
| Identification (Sodium): | A dense precipitate should form. |
| Identification D (By Loss on drying): | 11.5% - 14.5% |
| Acidity / PH: | pH of the solution should be between 4.2 and 4.5 |
| Clarity and colour of solution: | Clear and colorless solution |
| Arsenic (As): | NMT 2ppm |
| Iron (Fe): | NMT 10ppm |
| Sulphate (SO4): | NMT 300pm |
| Chloride (Cl): | NMT 0.014% |
| Reducing substances: | The solution retains a slight red color. |
| Loss on drying at 130°C: | 11.5% - 14.5% |
| Water: | 10.0% - 15.0% |
| Assay (Dried substance): | 98.0% - 100.5% |
| Assay (Anhydrous basis): | 98.0% - 103.0% |
| Insoluble Substances: | NMT 0.2% |
| Aluminium, Calcium and Related Element: | The sample solution should not become turbid when rendered slightly alkaline to litmus paper with 6N ammonium hydroxide. |
