| ITEMS | SPECIFICATION | RESULTS |
| Characters | a white almost white | a white crystalline powde |
| Identification | The IR Spectrum is concordant with spectrum of R.S. | conforms |
| pH | 3.5~ 5.5 | 4.9 |
| Specific optical rotation | +290°~ +315° | +306° |
| Related substance (Maximum sigle impuriy) | ≤1% | 0.10% |
| Water | 11.5%~14.5% | 12.80% |
| Sulphated ash | ≤1.0% | 0.07% |
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