Cefamandole Impurity 21 CAS CATO-C4X-122121
| CAS No. | CATO-C4X-122121 |
| Molecular Formula | C17H16N2O7S |
| Molecular Weight | 392.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C17H16N2O7S, Cefamandole Impurity 21 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 392.38 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a process- or degradation-related impurity, Cefamandole Impurity 21 (CAS CATO-C4X-122121, C17H16N2O7S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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), Cefamandole Impurity 21 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 | C17H16N2O7S |
| Molecular Weight | 392.38 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Cefamandole Standards
- Cefamandole Impurity 24 (CAS 51818-85-0)
- Cefamandole Nafate EP Impurity A (CAS CATO-C4X-122131)
- Cefamandole Impurity 22 (CAS CATO-C4X-122122)
- Cefamandole Impurity 35 (CAS CATO-C4X-122135)
- Cefamandole Impurity 10 (CAS CATO-C4X-122110)
- Cefamandole EP Impurity E (CAS 87932-78-3)
- Cefamandole Impurity 14 (CAS CATO-C4X-122114)
- Cefamandole Impurity 33 (CAS CATO-C4X-122133)
Recommended Standards
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- Clotrimazole Impurity 26 (CAS 29921-41-3)
- Favipiravir Impurity 8 (CAS 356783-29-4)
- Nebivolol EP Impurity C (CAS CATO-C4X-196848)
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