1 | Description | White crystalline powder. | White, granular crystals or a white, crystalline powder. |
2 | Solubility | Complies | Freely soluble in water, practically insoluble in ethanol (95%) and in ether |
3 | Identification A (By Chemical test) | Complies | Citrate: A dense white precipitate should form. |
4 | Identification B (By Chemical test) | Complies | Sodium: A violate color, white tuns to violet-blue should produce |
5 | Appearance of Solution | Complies | Solution A is clear and colourless. |
6 | Acidity or alkalinity | Complies | Not more than 0.5ml of 0.05 M sulphuric acid or 0.1 M sodium hydroxide is required. |
7 | Arsenic (As) | Less than 2 ppm | NMT 2ppm |
8 | Heavy metals | Less than 10 ppm | NMT 10ppm |
9 | Chlorides | Less than 100ppm | NMT 100pm |
10 | Oxalate | Less than 300ppm | NMT 300ppm (calculated as anhydrous oxalic acid) |
11 | Sulphate (SO4) | Less than 150ppm | NMT 150ppm |
12 | Tartrates | Complies | No crystalline precipitate is formed. |
13 | Readily carbonizable substances | Complies | The solution is not more intensely coloured than reference solution YS2 or GYS2. |
14 | Water | 11.1% | 11.0% -13.0% |
15 | Assay (Anhydrous basis) | 99.7% | 99.0%-101.0% |