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| Items | Standards |
|---|---|
| Appearance | White or light brown powder, odorless |
| Assay(%) | 98.5 Min |
| Specific rotation(°) | +18.0 - +21.5 |
| Loss on drying(%) | 1.0 Max |
| Residue on ignition(%) | 0.3 Max |
| Ammonium salt(%) | 0.04 Max |
| Heavy metals(ppm) | 30 Max |
| As(ppm) | 2.0 Max |
| pH | 5.0 - 6.0 |