1 | Description | A Clear, Colorless, syrupy liquid; hygroscopic. | A Clear, Colorless or almost colorless, syrupy liquid; hygroscopic. |
2 | Solubility | Complies | Miscible with water & with ethanol (95%) slightly soluble in acetone ; practically insoluble in ether and in fixed oils & volatile oils. |
3 | Identification by IR | Complies | IR spectra of the sample solution should be concomitant with the reference spectrum of glycerin. |
4 | Identification (By Refractive index, 20 ± 0.5°C) | 1.474 | 1.470 to 1.475 |
5 | Identification (By Relative density) | 1.261 | 1.258 to 1.268 |
6 | Appearance of solution | Complies | Solution should be colourless. |
7 | Acidity or Alkalinity | Complies | Not more than 0.2 mL of 0.1 M sodium hydroxide should require to produce a pink colour. |
8 | Chloride (Cl) | Less than 10ppm | NMT 10ppm |
9 | Aldehydes | Less than 10ppm | NMT 10ppm |
10 | Ester | Complies | NLT 8.0ml of 0.1M hydrochloric acid should require to decolorise the solution. |
11 | Halogenated compounds | Less than 35ppm | NMT 35ppm |
12 | Related substances (Diethylene glycol) | Not detected | NMT 0.1% |
13 | Related substances (ethylene glycol) | Not detected | NMT 0.1% |
14 | Related substances (Any impurity) | 0.01% | NMT 0.1% |
15 | Related substances (Total impurity) | 0.03% | NMT 1.0% |
16 | Sugars | Complies | The solution should remain blue and no precipitate should produce. |
17 | Heavy metals | Less than 5ppm | NMT 5ppm |
18 | Sulphated ash | 0.008% | NMT 0.01% |
19 | Water | 0.18% | NMT 2.0% |
20 | Assay (on Anhydrous basis) | 99.8% | 98.0% - 101.0% |