| Item | Specification | Results | |
| Appearance | A pale yellow powder | A pale yellow powder | |
| Identification | Should comply with the IR spectrum | Comply with the IR spectrum | |
| Related substances | Impurity A | ≤0.1% | Not detected |
| Impurity B | ≤0.1% | Not detected | |
| Impurity C | ≤0.05% | Not detected | |
| Impurity D | ≤0.05% | ＜0.03% | |
| Any other impurity | ≤0.10% | ＜0.03%(260nm) | |
| Total impurities | ≤0.3% | 0.04%(350nm) | |
| Heavy metals | ≤20ppm | ＜20ppm | |
| Loss on drying | ≤0.5% | 0.01% | |
| Sulphated ash | ≤0.1% | 0.06% | |
| Assay, on dreid basis | 99.0%～101.0% | 99.9% | |
| Residual solvents | Ethanol | ≤5000ppm | 240ppm |
| Xylene | ≤2170ppm | Not detected | |
