1 | Description | White crystalline powder. | Colourless crystals or a white or almost white crystalline powder. |
2 | Solubility | Complies | Very soluble in water, freely soluble in ethanol (95%) |
3 | Identification A (By Chemical test) | Complies | On ignition gradually decomposes giving off an odour resembling that of burnt sugar |
4 | Identification B (By Chemical test) | Complies | Solution should be strongly acidic |
5 | Identification C (Tartrate A) | Complies | After charring, when ignited carbon monoxide which burns with blue flame should evolve. |
6 | Identification C (Tartrate B) | Complies | An intense blue colour should produce. |
7 | Appearance of solution | Complies | Solution should be clear, and not more intensely coloured than reference solution YS6. |
8 | Specific optical rotation | +12.74° | +12.0° to +12.8° |
9 | Arsenic (As) | Less than 2ppm | NMT 2ppm |
10 | Heavy metals | Less than 10ppm | NMT 10ppm |
11 | Chlorides | Less than 125ppm | NMT 125ppm |
12 | Sulphate (SO4) | Less than 150ppm | NMT 150ppm |
13 | Oxalate | Complies | No opalescence should produce within 20 minutes |
14 | Sulphated ash | 0.04% | NMT 0.1% |
15 | Loss on drying | 0.1% | NMT 0.2% |
16 | Assay (on dried basis) | 99.8% | 99.5% - 101.0% |