Prednisolone Impurity 69 CAS 31311-61-2
| CAS No. | 31311-61-2 |
| Molecular Formula | C22H28O6S |
| Molecular Weight | 420.52 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Prednisolone Impurity 69 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
As a process- or degradation-related impurity, Prednisolone Impurity 69 (CAS 31311-61-2, C22H28O6S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Prednisolone Impurity 69 (C22H28O6S) contains a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C22H28O6S |
| Molecular Weight | 420.52 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Sulfur Atoms | 1 |
Related Prednisolone Standards
- Prednisolone Impurity 27 (CAS 76282-98-9)
- Prednisolone Impurity 16 (CAS CATO-C4X-173716)
- Prednisolone Sodium Phosphate USP Impurity I (CAS CATO-C4X-173738)
- Prednisolone Impurity 49 (CAS CATO-C4X-173749)
- Prednisolone Impurity 61 (CAS 50718-16-6)
- Prednisolone impurity 66 (CAS 137759-50-3)
- Prednisolone impurity 68 (CAS CATO-C4X-173768)
- Prednisolone Impurity 29 (CAS 106822-21-3)
Recommended Standards
- Tirofiban Impurity 73 (CAS CATO-C4X-125473)
- Bumetanide EP Impurity C (CAS 32643-00-8)
- ((R)-1-((S)-2-((4-carbamimidoylbenzyl)carbamoyl)pyrrolidin-1-yl-2,5,5-d3)-4-methyl-1-oxopentan-2-yl)glycine (CAS CATO-C3D-263090)
- Bumetanide EP Impurity D (CAS 153012-65-8)
- Neostigmine impurity 46 (CAS CATO-C4X-204246)
- Brimonidine Impurity 43 (CAS CATO-C4X-156643)
- Allisartan Isoproxil Impurity N2 (CAS 947331-10-4)
- 2-(6-Aminopyridin-3-yl)-1-benzyl-1-methylpyrrolidin-1-ium iodide (CAS 462061-15-0)
- {[1-(4-Methoxybenzoyl)-2-methyl-2,3-dihydro-1H-indol-6-yl]methyl}amine (CAS 1242910-27-5)
- Carmustine EP Impurity B (CAS 689-98-5)
- 4-(Chloromethyl)-2,3'-bipyridine (CAS 1227586-43-7)
- N-methoxy-N-methyl-4-oxopentanamide (CAS 193805-82-2)
- 1-(4-Methoxyphenyl)piperidin-3-ol (CAS 39104-03-5)
- (Leu31,Pro3?)-Neuropeptide Y (human, rat) trifluoroacetate salt (CAS 132699-73-1)
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