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Antipyrine
| ITEMS | LIMIT |
| Appearance | White or primrose yellow crystalline powder |
| Identification | IR |
| Melting point | 109~113°C |
| Appearance of Solution | clear and colorless |
| Acidity or alkalinity | complies |
| Chloride | 100ppm max |
| Loss on drying | ≤1.0% |
| Residue no Ignition | ≤0.1% |
| Heavy Metals | ≤0.002% |
| Related compounds | Meets the requirements |
| Assay (on drying) | 99.0~101% |
| Residual solvents(ethanol) | 1000ppm max |
| Related substances | impurity A |
| unspecified impurity0.05%max | |
| total impurities0.1%max |
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