| Specification | Grade | ||
|---|---|---|---|
| High Grade | First Grade | Second Grade | |
| Appearance | Transparent glassy mass | ||
| Color grade | X, Ww, Wg | Wg, N, M, K | J, H, G |
| Mass fraction of ash, %, max. | 0.03 | 0.04 | 0.06 |
| Mass fraction of mechanical impurities, %, max. | 0.03 | 0.03 | 0.03 |
| Softening point, °C, min. | 60 | 60 | 56 |
| Acid number, mg KOH/g, min. | 165 | 160 | 154 |
| Mass fraction of non-soapifiable matter, %, max. | 5 | 6 | 6 |