1 | Appearance | Colorless, crystalline powder | Colorless, transparent crystals, or white granular crystalline powder, or white flakes |
2 | Solubility | Passes | 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) | 39.7% | 39.0% - 40.5% |
6 | Appearance of solution | Passes | Clear and colourless solution |
7 | pH | 8.3 | 7.5 - 9.0 |
8 | Reducing substances | Complies | A pink colour should persist for atleast 1h |
9 | Chlorides | Less than 200ppm | 200ppm max |
10 | Sulphate (SO4) | Less than 50 ppm | 50 ppm max. |
11 | Arsenic(As) | Less than 2ppm | 2ppm max |
12 | Calcium(Ca)&Magnesium(Mg) | Less than 50ppm | 50ppm max |
13 | Calcium(Ca)& Magnesium(Mg) | Complies | No turbidity should produce within 5 min |
14 | Iron(Fe) | Less than 10ppm | 10ppm max |
15 | Loss on drying at 130°C | 39.7% | 39.0% - 40.5% |
16 | Assay (Dried substance) | 99.9% | 99.0% - 101.0% |
17 | Insoluble matter | 0.003% | 0.05% max. |
18 | Potassium(K) | Complies | No precipitate should form |