| 1 | Description | A white , crystalline powder; odourless; hygroscopic. | A white , crystalline powder or fragments or granules; odourless; hygroscopic. | IP |
| 2 | Solubility | Complies | Freely soluble in water, soluble in ethanol (95%). | IP |
| 3 | Identification A (Calcium1) | Complies | A white, crystalline precipitate should form. | IP |
| 4 | Identification A (Calcium 2) | Complies | A white precipitate that sparingly soluble in dilute acetic acid but soluble in hydrochloric acid should form. | IP |
| 5 | Identification B (Chloride) | Complies | A curdy white precipitate insoluble in dilute nitric acid but soluble in dilute ammonia should form. | IP |
| 6 | Appearance of solution | Complies | Solution should be clear and not more intensely coloured than the reference solution YS6. | IP |
| 7 | Acidity or Alkalinity | 0.12 ml of 0.01M sodium hydroxide required. | Not more than 0.2 mL of 0.01M sodium hydroxide or 0.01M of hydrochloric acid should require. | IP |
| 8 | Arsenic | Less than 3 ppm | NMT 3 ppm | IP |
| 9 | Aluminium and phosphate | Complies | No turbidity or precipitate should form. | IP |
| 10 | Barium(Ba) | Complies | A solution should not be more opalascent than standard. | IP |
| 11 | Heavy metals | Less than 10ppm | NMT 10ppm | IP |
| 12 | Iron(Fe) | Less than 20ppm | NMT 20ppm | IP |
| 13 | Magnesium and alkali salts | 0.2% | NMT 1.0% | IP |
| 14 | Sulfates | Less than 300 ppm | NMT 300 ppm | IP |
| 15 | Assay | 99.6% | 97.0% - 103.0% | IP |