1 | Appearance | A white powder hygroscopic . | A white or almost white powder, hygroscopic |
2 | Solubility | Passes | Soluble in water, practically insoluble in ethanol (96%). |
3 | Identification A (By Chemical test) | Complies | Solution S is silghtly alkaline. |
4 | Identification B (By Loss on drying) | 0.31% | Not more than 1.0% |
5 | Identification C (By Chemical test) | Complies | Solution S gives reaction (b) of phosphates |
6 | Identification D (By Chemical test) | Complies | Solution S gives reaction (a) of sodium |
7 | Appearance of solution | Complies | Solution S is clear and colourless. |
8 | Reducing substances | Complies | To comply the test. |
9 | Monosodium Phosphate | NMT 2.5% | 2.5% max, ratio should be not greater than 0.025. |
10 | Chlorides | NMT 200 ppm | 200ppm max |
11 | Sulphate (SO4) | NMT 500 ppm | 500ppm max |
12 | Arsenic (As) | NMT 2 ppm | 2ppm max |
13 | Iron(Fe) | Not detected | 20ppm max |
14 | Heavy metals | NMT 10 ppm | 10ppm max |
15 | Loss on drying,130°C | 0.31% | Not more than 1.0% |
16 | Assay (Dried substance) | 99.70% | 98.0% - 101.0% |