| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Characteristics | White or almost white powder | Conforms |
| Identification | Positive | Conforms |
| PH | 3.5~5.5 | 4.6 |
| Specific optical rotation | +280°~+305° | +298° |
| Related substances | Any impurity ≤1.0% | 0.25% |
| Water | 12.0%~15.0% | 13.6% |
| Dimethylaniline | ≤20ppm | <20ppm |
| Sulphated ash | ≤0.5% | 0.06% |
| Assay | 96.0%~102.0% | 99.1% |
| Conclusion: The Product Conforms to USP/EP. |
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