| Item | Standard |
| Appearance | White crystalline powder |
| Appearance of solution | clear and colourless |
| Acidity or alkalinity | Conforms. |
| Specific optional rotation | -91.0 ~-93.5° |
| Foreign sugars | Conforms. |
| Barium | Conforms. |
| Arsenic | ≤1ppm |
| Sulfated ash | ≤0.1% |
| Calcium and magnesium | ≤0.005% |
| Loss on drying | ≤0.5% |
| Heavy metals | ≤5ppm |
| Lead | ≤0.5 ppm |
| Storage | in the shade |
| Packing | 25kg/bag |


China