Cefotaxime Impurity 21 CAS CATO-C4X-120121
| CAS No. | CATO-C4X-120121 |
| Molecular Formula | C14H15N5O6S2 |
| Molecular Weight | 413.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Cefotaxime Impurity 21 (CAS CATO-C4X-120121), a pharmacopoeial impurity reference standard (molecular formula C14H15N5O6S2, MW 413.43 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Cefotaxime Impurity 21 (C14H15N5O6S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 413.43 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C14H15N5O6S2 |
| Molecular Weight | 413.43 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Cefotaxime Standards
- Cefotaxime EP Impurity B (CAS 66340-28-1)
- Cefotaxime Impurity 24 (CAS CATO-C4X-120124)
- Cefotaxime open ring lactone (CAS CATO-C4X-120141)
- Cefotaxime Impurity 76 (CAS CATO-C4X-120176)
- Cefotaxime Impurity 97 (CAS CATO-C4X-120197)
- Cefotaxime Impurity 50 (CAS CATO-C4X-120150)
- Cefotaxime Impurity 50 (CAS CATO-C4X-120157)
- Cefotaxime Impurity 95 (CAS CATO-C4X-120195)
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Why CATO?
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