| Testing Index | Specifications | Conclusion |
| Characters | White or almost white, crystalline powder, slightly soluble in water, freely soluble in alcohol and in ethylene chloride | Qualified |
| Melting range | 96℃~100℃ | 96.6℃~97.8℃ |
| Identification | Infrared Absorption | Qualified |
| Ultraviolet Absorption | Qualified | |
| Heavy metals | ≤0.002% | <0.002% |
| Loss on drying | ≤0.50% | 0.04% |
| Chlorides | ≤100ppm | <100ppm |
| Related substances | Any spot not more than 0.5% and at most one such spot is more than 0.2% | Qualified |
| Sulphated ash | ≤0.10% | 0.02% |
| Assay | 99.0%~ 101.0% | 99.90% |
| Conclusion: The Product Conforms to USP/EP. |
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