CAS number： 50-24-8
Molecular formula： C21H28O5
molecular weight： 360.444
Chemical structure：
| Product: | Prednisolone | |
| Expiry Time: | 2 years | |
| Standard: | BP93 | |
| Item | Specification | Result |
| Appearance | A white or almost white crystalline powder，hygroscopic. | An almost white crystalline powder |
| Identification | ||
| A:I.R. Spectrum | Concordant with that of R.S./WS | Complies |
| B: Identification of Steroids | To comply with I.P. Test | Complies |
| Solubility | Very slightly soluble in water, soluble in ethanol (95%) and in methanol; sparingly soluble in acetone; slightly soluble in chloroform. | Complies |
| Melting range | About 230℃ | 230℃ |
| Light absorption | 400 ~ 430 | 403.9 |
| Specific optical rotation | +96° ~ +102° | +99.2° |
| Related substance: | ||
| Individual impurity | ≤2.0% | 0.8% |
| Not more than one impurity | ≥1.0% | Complies |
| Loss on drying | ≤1.0% | 0.3% |
| Assay | 96.0%~104.0% | 99.5% |
| Conclusion: | Complies with BP93 |
