1 | Appearance | Syrupy liquid, unctuous to the touch, colourless, clear, very hygroscopic. | Syrupy liquid, unctuous to the touch, colourless or almost colourless, clear, very hygroscopic. |
2 | Solubility | Complies | Miscible with water and with ethanol (96%), slightly soluble in acetone, practically insoluble in fatty oils and in essential oils. |
3 | Identification A (By Refractive index, 20±0.5°C) | 1.453 | 1.449 to 1.455 |
4 | Identification B (By IR) | Complies | IR spectra of the sample should be concomitant with IR spectra of the corresponding standard. |
5 | Identification C (Relative density) | 1.226 | 1.221 to 1.232 |
6 | Appearance of solution | Complies | The solution should be clear and colorless. |
7 | Acidity or alkalinity | Complies | NMT 0.2ml of 0.1M sodium hydroxide should require to change the color of the indicator to pink. |
8 | Refractive index (20°C ± 0.5°C) | 1.453 | 1.449 to 1.455 |
9 | Aldehydes | Less than 10ppm | NMT 10ppm |
10 | Ester | Complies | NLT 8.0mL of 0.1M hydrochloric acid should require to change the color of the indicator. |
11 | Related substances: Impurity A (Diethylene glycol) | Not detected | NMT 0.1% |
12 | Related substances: Any other impurity with a retention time less than the retention time of glycerol | 0.02% | NMT 0.1% |
13 | Related substances: Total of all impurities with retention times greater than the retention time of glycerol | 0.01% | NMT 0.5% |
14 | Halogenated compounds | Less than 30ppm | NMT 30ppm |
15 | Sugars | Complies | The solution should remain blue and no precipitate should form. |
16 | Chlorides | Less than 10ppm | NMT 10ppm |
17 | Water | 12.9% | 12.0% to 16.0% |
18 | Sulfated ash | 0.006% | NMT 0.01% |
19 | Assay | 85.5% | 83.5% m/m to 88.5% m/m |