1 | Description | Colourless crystals slightly hygroscopic in moist air. | Colourless crystals or a white powder; slightly hygroscopic in moist air. |
2 | Solubility | Passes | Very soluble in water, freely soluble in ethanol (95%), sparingly soluble in ether. |
3 | Identification A (By IR) | Complies | To Comply the test |
4 | Identification B (By Chemical test) | Complies | It gives reaction (A) of citrates. |
5 | Identification C (By Chemical test) | Complies | A 10.0% w/v solution is strongly acidic. |
6 | Appearance of Solution | Complies | The solution is clear and not more intensely coloured than reference solution YS7, BYS7 or GY7. |
7 | Arsenic (As) | NMT 1ppm | 1ppm max |
8 | Barium(Ba) | Complies | Any opalescence produced is not more intense than that of mixture of 5ml of solution A and 5ml of distilled water. |
9 | Calcium (Ca) | NMT 200ppm | 200ppm max. |
10 | Heavy metals | NMT 10ppm | 10ppm max |
11 | Iron (Fe) | NMT 50ppm | 50ppm max |
12 | Chlorides | NMT 50ppm | 50ppm max |
13 | Sulphate (SO4) | NMT 150ppm | 150ppm max |
14 | Oxalic acid | Passes | Any pink colour produced is not more intense than that produced by carrying out the test using 0.2mg of oxalic acid dissolved in 4ml of water. |
15 | Readily carbonizable substances | Passes | Any colour produced is not more intense than that of a mixture of 1.0 ml of CCS and 9.0 ml of FCS. |
16 | Sulphated ash | 0.04% | Not more than 0.1% |
17 | Water | 0.36% | Not more than 1.0% |
18 | Assay (Anhydrous basis) | 99.54% | Not less than 99.0% and Not more than 101.0% |