| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Appearance | Yellow or brownish-yellow crystalline powder | Conforms |
| Identification | Infrared absorption | Conforms |
| Ultraviolet absorption | Conforms | |
| Dissolve 400mg of potassium hydroxide in 10ml of alcohol. Immediately before use dilute this solution with deimethylformamide to 100ml. to 10ml of the prepared solution add a few crystals of Nitrofurazone: a purple solution results | Conforms | |
| PH | 5.0~7.5 | 6.3 |
| Loss on drying | ≤0.50% | 0.10% |
| Residue on ignition | ≤0.1% | 0.06% |
| Ordinary impurities | ≤2.0% | < 2.0% |
| Limit of 5-nitro-2-furfuraldazine | ≤0.5% | < 0.5% |
| Residual solvent | Acetic acid ≤1000ppm | 453ppm |
| Assay | 98.0%~102.0% | 100.1% |
| Conclusion: The Product Conforms to USP. |
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