Specification
| Appearance | White powder | White powder |
| Solubility (%) | Freely soluble in water,ethanol,proplyene glycol and glycerol | Conform |
| Specific rotation | -15.5--17.5 | -15.8 |
| Water (%) | ≤5.0 | 4.9 |
| Melting point (℃) | 50.5-58.5 | 57.4-58.4 |
| Lead (mg/KG) | ≤1 | Conform |
| PH | 3.0-5.0 (1%aqueous solution) | 3.9 |
| Arsenic (mg/KG) | ≤3 | Conform |
| Cadmium (mg/KG) | ≤1 | Conform |