1 | Appearance | Slightly yellow liquid. | Colourless or slightly yellow liquid. |
2 | Solubility | Complies | Very slightly soluble in water, miscible with ethanol (96%) and with fatty and essential oils. |
3 | Identification A (By Chemical test) | 159°C | A dried precipitate should melt at 156 °C to 161 °C |
4 | Identification B (By Chemical test) | Complies | A Violet colour should devlop. |
5 | Appearance of Solution | Complies | The solution should clear and not more intensely coloured than reference solution Y7 |
6 | Acidity | Complies | NMT 0.4mL of 0.1M sodium hydroxide should required to restore the blue colour. |
7 | Relative density, 20°C | 1.184 | 1.180 to 1.186 |
8 | Refractive index (20°C ± 0.5°C) | 1.537 | 1.535 to 1.538 |
9 | Assay | 99.7% | 99.0% - 100.5% m/m |