| Description | White crystalline powder odourless & colour less |
| Solubility | Practically insoluble in water and in ethanol (96%). It dissolves in dil.hydrochloric acid and in nitric acid. |
| Identification | A. A white precipitate is produced. B. A yellow precipitate is produced |
| Acid insoluble substances | NMT 0.2% w/w |
| Arsenic | NMT 10 ppm |
| Barium | No turbidity produced |
| Iron | NMT 400 ppm |
| Carbonate | No effervescence is produced |
| Chloride | NMT 0.25% |
| Sulphate | NMT 0.5% |
| Fluorides | NMT 100 ppm |
| Loss on Ignition | 6.6% - 8.7% |
| Assay | Between 97.5% and 102.5% |
| Bulk Density | NLT 0.70g/ml |
| Tap Density | NLT 0.85g/ml |