Ebastine Impurity 22 CAS CATO-C4X-202922
| CAS No. | CATO-C4X-202922 |
| Molecular Formula | C17H18O2 |
| Molecular Weight | 254.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Ebastine Impurity 22 (CAS CATO-C4X-202922, C17H18O2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a steroid core, a hydroxyl group, an ether linkage, Ebastine Impurity 22 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 254.32 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
As a certified reference material (CRM), Ebastine Impurity 22 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.
Physical & Chemical Properties
| Molecular Formula | C17H18O2 |
| Molecular Weight | 254.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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 |
Related Ebastine Standards
- Ebastine EP Impurity C (CAS 58258-01-8)
- Ebastine Impurity N2 (CAS 43076-61-5)
- Ebastine Impurity 25 (CAS CATO-C4X-202925)
- Ebastine Impurity 24 (CAS CATO-C4X-202924)
- Ebastine Impurity 19 (CAS CATO-C4X-202919)
- Ebastine Impurity 11 (CAS 1229622-28-9)
- Ebastine Impurity 20 (CAS CATO-C4X-202920)
- Ebastine Impurity 16 (CAS CATO-C4X-202916)
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- Tolvaptan Impurity 57 (CAS CATO-C4X-195557)
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- 4-Methoxy-3-phenylbenzoic acid (CAS 4477-64-9)
- 2,2-Difluoro-1,3-dioxaindane-4-thiol (CAS 1314969-42-0)
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