1 | Appearance | Colorless, transparent crystals. | Colorless, transparent crystals, or white, granular crystalline powder, or white flakes |
2 | Solubility | Complies | Very soluble in water, soluble in ethanol (96%) |
3 | Identification (For Acetates) | Complies | A blue precipitate should form or dark blue colour should devlope |
4 | Identification (Sodium) | Complies | A dence white precipitate should form |
5 | Identification (By Loss on drying) | 39.3% | 39.0% - 40.5% |
6 | Appearance of solution | Complies | Clear and colourless solution |
7 | pH | 8.2 | 7.5 - 9.0 |
8 | Reducing substances | Complies | A pink colour should persist for atleast 1h |
9 | Chlorides | Less than 200ppm | NMT 200ppm |
10 | Sulphate (SO4) | Less than 50 ppm | NMT 50 ppm |
11 | Arsenic (As) | Less than 2ppm | NMT 2ppm |
12 | Calcium(Ca)&Magnesium(Mg) | 24 ppm | NMT 50ppm |
13 | Calcium(Ca)& Magnesium(Mg) | Complies | No turbidity should produce within 5 min |
14 | Iron (Fe) | Less than 10ppm | NMT 10ppm |
15 | Loss on drying,120°C | 39.0% | 38.0% - 41.0% |
16 | Loss on drying at 130°C | 39.3% | 39.0% - 40.5% |
17 | Assay (Dried substance) | 99.8% | 99.0% - 101.0% |
18 | Insoluble matter | 0.005% | NMT 0.05% |
19 | Potassium (K) | Complies | No precipitate should form |