1 | Appearance | A white powder. | A white or almost white powder or colorless crystals. |
2 | Solubility | Passes | Soluble in water, practically insoluble in ethanol (96%) |
3 | Identification A (By Chemical test) | Complies | Solution should be slightly alkaline |
4 | Identification B (By Loss on drying) | 20.6% | 19.5% - 21.0% |
5 | Identification C (By phosphate ) | Complies | A yellow color should develop. |
6 | Identification D (By sodium) | Complies | A dense white precipitate should form. |
7 | Appearance of solution | Passes | Clear and colorless solution. |
8 | Reducing substances | Passes | The color of the permanganate should not completely discharge. |
9 | Monosodium Phosphate | Less than 2.5% | 2.5% max. |
10 | Chlorides | Less than 400ppm | 400ppm max |
11 | Sulphate (SO4) | Less than 0.1% | 0.1% max |
12 | Arsenic (As) | Less than 4ppm | 4ppm max |
13 | Iron(Fe) | Less than 40ppm | 40ppm max |
14 | Loss on drying,130°C | 20.6% | 19.5% - 21.0% |
15 | Assay (Dried substance) | 99.8% | 98.0% - 101.0% |