1 | Description | White, granular. Effloresces in warm, dry air. Its solutions are alkaline to phenolphthalein. A 0.1M solution should have a pH about 9 | Colorless or white, granular or caked salt. Effloresces in warm, dry air. Its solutions are alkaline to phenolphthalein. A 0.1M solution should have a pH about 9. |
2 | Solubility | Passes | Freely soluble in water; very slightly soluble in alcohol |
3 | Identification A (By Chemical test 1) | Complies | A dense precipitate should form |
4 | Identification B (By Chemical test 1) | Complies | With silver nitrate solution neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide |
5 | Appearance of solution | Passes | Clear and colourless solution |
6 | Identification B (By Chemical test 2) | Complies | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate that should soluble in 6N ammonium hydroxide. |
7 | Water insoluble matter | 0.29% | NMT 0.4% |
8 | pH(5% aq soln) | 9.0 | 8.7-9.3 |
9 | Chloride(Cl) | Less than 0.0200% | NMT 0.0200% |
10 | Sulphate(SO4) | Less than 0.0500% | NMT 0.0500% |
11 | Iron(Fe) | Less than 0.002% | NMT 0.002% |
12 | Arsenic (As) | Less than 0.0002% | NMT 0.0002% |
13 | Sodium dihydrogen phosphate | Less than 1.7% | NMT 1.7% |
14 | Substance reducing permanganate | Passes | Passes test |
15 | Loss on drying at 130°C | 47.1% | 45.0-49.0% |
16 | Total aerobic microbial count | Less than 100 CFU/gm | NMT 100 CFU/gm |
17 | Total Yeast and mold count | Less than 100 CFU/gm | NMT 100 CFU/gm |
18 | Bacterial endotoxins | Less than 2.5 IU/gm | NMT 2.5 IU/gm |