| Test Items | Standards | |
| Appearance | Clear, colourless to slightly yellow or greenish-yellow, | |
| | viscous, oily liquid | |
| Solubility | Practically insoluble in water, freely soluble in acetone, in | |
| | ethanol and vegetable oils | |
| Assay | ≥98.0% | 99.2% |
| Identification A, B, C | Correspond | confirm |
| Related substances | Impurity A :≤0.5% | 0.07% |
| | Impurity B :≤1.5% | 0.73% |
| | Impurity C(free tocopherol) :≤0.5% | 0.2% |
| | Sum of impurity D and E :≤1.0% | 0.15% |
| | Any other impurity, for each impurity: ≤0.25% | 0.25% |
| | Total: ≤2.5% | 1.6% |
| Optical rotation | −0.01° to + 0.01° | confirm |
| Acid Value | ≤2.0mg KOH/g | 0.09mg KOH/g |
| Free tocopherol | ≤0.5% | 0.3% |
| Sulphated ash | ≤0.10% | < 0.1%< 10 |
| Heavy Metals | ≤10mg/kg | 10mg/kg |
| Lead | ≤2mg/kg | 2mg.kg |
| Arsenic | ≤1mg/kg | 1mg/kg |
| Refactive index(20℃) | 1.494~1.498 | < 1mg/kg |
| Absorbance | 42.0~45.0 Max. at about 284nm | confirm |
| | 7.5~9.0 Min. at about 254nm | confirm |
| Density(20℃) | 0.952~0.966g/ml | confirm |
| Residual solvents | Meet the requirement | confirm |
