Cefoxitin EP Impurity I CAS CATO-C4X-157813
| CAS No. | CATO-C4X-157813 |
| Molecular Formula | C16H17N3O7S2 |
| Molecular Weight | 427.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO supplies Cefoxitin EP Impurity I (CAS CATO-C4X-157813), a pharmacopoeial impurity reference standard (molecular formula C16H17N3O7S2, MW 427.45 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Cefoxitin EP Impurity I (C16H17N3O7S2) contains a flavonoid core, 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 427.45 g/mol, it falls into the moderately-high-molecular-weight range. 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).
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 | C16H17N3O7S2 |
| Molecular Weight | 427.45 g/mol |
| Purity | >95% |
| 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 | 3 |
| Sulfur Atoms | 2 |
Related Cefoxitin Standards
- Cefoxitin EP Impurity B (CAS CATO-C4X-15782)
- Cefoxitin (CAS 35607-66-0)
- Cefoxitin Impurity 29 (CAS CATO-C4X-157829)
- Cefoxitin Impurity 30 (CAS CATO-C4X-157830)
- Cefoxitin Impurity 6 (CAS 1422023-32-2)
- Cefoxitin Impurity 31 (CAS CATO-C4X-157831)
- Cefoxitin Impurity 24 (CAS CATO-C4X-157824)
- Cefoxitin Impurity 25 (CAS CATO-C4X-157825)
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