| TESTS ITEMS | SPECIFICATION | RESULTS |
| Appearance | White crystalline power almost odorless | Pass |
| Assay | 99.0%~100.5% | 99.53% |
| Identification | Positive | Pass |
| Solubility | Freely soluble in water, sparingly soluble in alcohol, insoluble in ether | Pass |
| Melting point | Meet at about 153 with decomposition | Pass |
| Water(Karl fisher method) | ≤0.5% | ＜0.3% |
| Reducing substances | ≤0.5% | ＜0.5% |
| Lead(Pb) | ≤10ppm | ＜10ppm |
| Heavy metals | ≤20ppm | ＜20ppm |
| As | ≤10ppm | ＜1ppm |
| Sulphate ash | ≤0.10% | ＜0.10% |
| Chlorides | ≤0.02% | ＜0.02% |
| Iron | ≤0.001% | ＜0.001% |
| Residue on ignition | ≤0.001% | ＜0.001% |
| Special usage recommendation | After opening the original packing,the complete content should be used immediately. Material can be microbiologically contaminated from unhygienic environment. | |
| Conclusion: The Product Conforms to USP |
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