Cefepime EP Impurity A CAS 97164-57-3
| CAS No. | 97164-57-3 |
| Molecular Formula | C19H24N6O5S2 |
| Molecular Weight | 480.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Cefepime EP Impurity A is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Cefepime EP Impurity A (CAS 97164-57-3) is a certified pharmaceutical impurity reference standard with the molecular formula C19H24N6O5S2 and a molecular weight of 480.56 g/mol.
Structurally, Cefepime EP Impurity A (C19H24N6O5S2) 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 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 480.56 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).
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), Cefepime EP Impurity A 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 | C19H24N6O5S2 |
| Molecular Weight | 480.56 g/mol |
| Purity | >90% |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 2 |
Related Cefepime Standards
- Cefepime EP Impurity A (CAS 149261-27-8)
- Cefepime Impurity 10 (CAS 88040-25-9)
- Cefepime (CAS 88040-23-7)
- Cefepime Impurity 12 (CAS 2416213-67-5)
- Cefepime impurity 37 (CAS CATO-C4X-119337)
- Cefepime Oxide Impurity (CAS CATO-C4X-11938)
- Cefepime Impurity 17 (CAS CATO-C4X-119317)
- Cefepime Impurity 14 (CAS CATO-C4X-119314)
Recommended Standards
- (6R,7S)Cefepime Impurity (CAS CATO-C4X-11939)
- Dapsone EP Impurity C (CAS 54616-64-7)
- Dabigatran Impurity 62 (CAS CATO-C4X-108962)
- Dipyridamole EP Impurity F (CAS 60286-30-8)
- Alogliptin Impurity 65 (CAS 334618-23-4)
- Clinofibrate Impurity 1 (CAS 30299-29-7)
- Tofacitinib Impurity 142 (CAS 1431697-80-1)
- 3-(Benzylamino)benzoic acid (CAS 63760-14-5)
- Neratinib Impurity 10 (CAS 1144516-13-1)
- 4-Chloro-6-ethylquinoline (CAS 188758-77-2)
- 5-Cyano-1-methyl-4-nitro-1H-imidazole-2-carboxylic acid (CAS 754917-50-5)
- (R)-1-(2-bromo-3-fluorophenyl)-2-methoxyethan-1-amine (CAS 1269788-98-8)
- Ethyl 4-(cyclopentylamino)-3-nitrobenzoate (CAS 885312-78-7)
- Semaglutide impurity 248 (CAS CATO-C4X-2226248)
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