| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Appearance | Orange crystalline powder, odorless, hygroscopic | Conforms |
| Solubility | Soluble in N,n-dimethylformamide and water, sparingly soluble in Acetonitrile, slightly soluble in dichloromethane, almost insoluble in methanol | Conforms |
| Identification | IR: the map of the test samples should be consistent with the map of the reference | Conforms |
| UV: at the max. absorption at 246nm and 350nm | Conforms | |
| In the chromatogram recorded under the content determination, the retention time of the principal peak of the test solution corresponds to the one in the chromatogram obtained with the standard solution | Conforms | |
| PH | 7.0~8.5 | 7.9 |
| Moisture | ≤3.0% | 1.9% |
| Residue on ignition | ≤0.1% | 0.04% |
| Heavy metals | ≤20ppm | <20ppm |
| Purity | ≥98.5% | 99.7% |
| Conclusion: The Product Conforms to Enterprise Standard. |
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