1 | Appearance/Description | White crystalline powder. | White crystalline powder. |
2 | Solubility | Complies | Soluble in water; insoluble in alcohol.Practically insoluble in ethanol (95%) |
3 | Identification (Sodium) | Complies | A dense precipitate should form. |
4 | Identification (Bicarbonate 1) | Complies | Effervesce with acids, evolves a colorless gas that when pass into calcium hydroxide solution produces white precipitate immediately |
5 | Identification (Bicarbonate 2) | Complies | A cold solution should be only slightly colored by phenolphthalein solution |
6 | Identification (By chemical test 1) | Complies | A pale pink color should produce. On heating gas should evolve and the solution become red |
7 | Identification (By chemical test 2) | Complies | white precipitate should form which dissolves on addition of an excess of hydrochloric acid. |
8 | Assay (on dried basis) | 99.8% | 99.0% - 100.5% |
9 | Appearance of solution | Complies | Clear and colorless solution |
10 | Insoluble Substances | Complies | The solution should be complete and clear |
11 | Normal carbonate | Complies | The solution does not assume more than a faint pink color immediately. |
12 | Carbonate | 8.21 | The pH of freshly prepared solution should not be greater than 8.6 |
13 | Chloride and Sulfate (Chloride) | Less than 0.015% | NMT 0.015% |
14 | Limit of sulfur compound | Less than 0.015% | NMT 0.015% |
15 | Arsenic (As) | Less than 2ppm | NMT 2ppm |
16 | Limit of Ammonia | Less than 20ppm | NMT 20 ppm |
17 | Calcium (Ca) | Less than 100ppm | NMT 100ppm |
18 | Iron (Fe) | Less than 20ppm | NMT 20ppm |
19 | Loss on drying | 0.1% | NMT 0.25% |