CASR |
: | 13472-35-0 |
Molecular Formula |
: | NaH2PO4.2H2O |
Molecular Weight |
: | 156.01 |
| Specifications | |
|---|---|
| Description: | Colorless crystals or white, crystalline powder is odorless and is slightly deliquescent. Its solutions are acid to litmus and effervesce with sodium carbonate |
| Solubility: | very soluble in water; practically insoluble in alcohol. |
| Identification A (By Chemical test): | Solution should be slightly acid |
| Identification A (Sodium): | A dense whiter precipitate should form |
| Identification (Phosphate 1): | A neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide |
| Identification (Phosphate 2): | A yellow precipitate should form of which color does not changes by boiling and which dissolves on addition of ammonia. |
| Identification (Phosphate 3): | A yellow color should develop |
| Appearance of solution: | Clear and colorless solution |
| pH: | 4.2 - 4.5 |
| Insoluble Substances: | NMT 0.2% |
| Chlorides: | NMT 0.014% |
| Sulphate (SO4): | 300ppm max |
| Aluminium, Calcium and Related Elemant: | The sample solution should not become turbid when rendered slightly alkaline to litmus paper with 6N ammonium hydroxide. |
| Water: | 18.0% - 26.5% |
| Loss on drying,130°C: | 21.5% - 24.0% |
| Reducing substances: | The color of permanganate should not completely discharge |
| Arsenic (As): | 2ppm max |
| Iron (Fe): | 10ppm max |
| Assay (on dried basis): | 98.0% - 100.5% |
