Sr.No
| Test | Specification (IP) | Specification (BP) |
1. | Description | ColourIess crystals or a white powder; odourless | White or almost whitepowder or colourless crystals |
2. | Identification | The resulting solution gives the reaction of potassium and iodide salt | | As per BP |
3. | solubility | Freely soluble in water,practically insoluble in ethanol and ether | Very soluble in water,freely soluble in |
4. | Appearance of solution | Solution A is clear and colorless | Solution S is clear andcolourless |
5. | Alkalinity | No colour is produced | NMT 0.5 mL of0.01 M HCL isrequired |
6. | Arsenic | NMT 2 ppm | --- |
7. | Barium | No turbidity develops within one minute | --- |
8. | Cyanide | No blue colour is produced | --- |
9. | Iodate | No blue colour is producedwithin 2 minutes | No blue colour develops. |
10. | Heavy metals | 10 ppm | --- |
11. | Sulphates | 150 ppm | Maximum 150 ppm |
12. | Iron | 20 ppm | Maximum 20 ppm. |
13. | Thiosulphate | A blue colour is produced | Blue colour is produced |
14. | Loss on drying | NMT 1.0% | NMT 1.0% |
15. | Assay | 99.0 % to 100.5 % ODB | 99.0 % to 100.5 % ODB |