Items | Standard |
Appearance | The product is white fine granular powder, odorless and tasteless. |
Identification | Take about 0.lg of this product,dissolve inwater to 5ml, add one dropofferrictrichloride solution, generate the yellowish green. |
Assay (on thedried basis) | ≥98.0% |
Specific rotation | +13.0°~ +16.0° |
рH | 6.0~8.0 |
Loss on drying | ≤1.5% |
Heavy metal (As) | ≤ 3ppm |
Heavy metal (Pb) | ≤ 2ppm |
Chloride | ≤0.5% |