| Property | Specification | Test Method |
|---|---|---|
| Assay (Glycerin) | ≥ 99.0% | BP: Titrimetry with periodic acid [BP method] USP: Gas Chromatography [USP method] |
| Appearance | Clear, colorless or almost colorless, very hygroscopic, syrupy liquid, unctuous to the touch | Visual |
| Color | Not darker than reference standard solution | BP: Hazen Pt [BP method] |
| Refractive Index (20°C) | 1.470 – 1.475 | Refractometer |
| Specific Gravity (25°C) | 1.256 – 1.260 | Pycnometer |
| Acidity | No more than faint pink to phenolphthale |
