1 | Description | Colorless, transparent crystals. | Colorless, transparent crystals. |
2 | Solubility | Passes | Freely soluble in water; practically insoluble in ethanol (96%) |
3 | Identification (By chemical test) | Complies | Solution should be slightly alkaline |
4 | Identification (By Loss on drying) | 58.3% | 57.0% -61.0% |
5 | Identification (Sodium) | Complies | A dense precipitate should form. |
6 | Identification (Phosphate 1) | Complies | A yellow precipitate soluble in 2N nitric acid and in 6 N ammonium hydroxide should form. |
7 | Identification (Phosphate 2) | Complies | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate which should soluble in 6N ammonium hydroxide. |
8 | Identification (Phosphate 3) | Complies | A yellow color should develop. |
9 | Assay (on dry basis) | 99.2% | 98.0% - 100.5% |
10 | Insoluble Substances | 0.2% | NMT 20mg (NMT 0.4%) |
11 | Appearance of solution | Passes | Clear and colorless solution. |
12 | Reducing substances | Passes | The color of the permanganate should not completely discharge |
13 | Monosodium Phosphate | Less than 2.5% | NMT 2.5% |
14 | Chlorides | Less than 200ppm | NMT 200ppm |
15 | Sulphate (SO4) | Less than 500ppm | NMT 500ppm |
16 | Arsenic (As) | Less than 2ppm | NMT 2ppm |
17 | Iron(Fe) | Less than 20ppm | NMT 20ppm |
18 | Loss on drying at 130°C | 58.3% | 57.0% -61.0% |
19 | Total aerobic microbial count | Less than 100 CFU/gm | NMT 100 CFU/gm |
20 | Total combined yeast and mould count | Less than 10 CFU/gm | NMT 10 CFU/ gm |
21 | Bacterial endotoxin test | Less than 2.5 EU/gm | NMT 2.5 EU/gm |