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 |