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CAS number： 22071-15-4;22161-81-5
Molecular formula： C16H14O3
molecular weight： 254.2806
Chemical structure：
| Product Name | Ketoprofen | |
| Shelf Life | 5 years | |
| Analysis content | Standard | Analysis results |
| Characters | Odourless or almost odourless white crystalline powder | Meets |
| Identification | ||
| Clarity of solution | clear | clear |
| Colour of solution | ≤r.s.Y6 | <Y6 |
| Assay(alkametric) | 99.0～100.5% | 99.6% |
| Assay(HPLC) | 99.0～100% | 99.69% |
| Loss on drying | 0.5%max | 0.14% |
| Residue on ignition | 0.2%max | 0.07% |
| Melting point | 94～97℃ | 94.5—95.0℃ |
| Heavy metals | 0.002% max | ＜0.002% |
| HPLC sum of other impurities | 0.4% max | 0.13% |
| the largest individual impurity (HPLC) | 0.2%max | 0.18% |
| Specific Rotation | Between +1º and -1º | 0 |
| Organic Volatile impurities | Meets | Meets |
| Conclusion: | Complies with requirements of USP/EP. | |