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: | Freely 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): | NMT 300ppm |
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): | NMT 2ppm |
Iron (Fe): | NMT 10ppm |
Assay (on dried basis): | 98.0% - 100.5% |
Bacterial endotoxin: | NMT 2.5 EU/gm |