Cefepime EP Impurity D Sodium Salt CAS 78172-35-7
| CAS No. | 78172-35-7 |
| Molecular Formula | C6H6N3O3S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Cefepime EP Impurity D Sodium Salt.
Cefepime EP Impurity D Sodium Salt (CAS 78172-35-7) is a certified pharmaceutical impurity reference standard with the molecular formula C6H6N3O3SNa and a molecular weight of 223.18 g/mol.
Based on its molecular formula C6H6N3O3SNa, Cefepime EP Impurity D Sodium Salt contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 223.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 D Sodium Salt 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 | C6H6N3O3S Na |
| Molecular Weight | 223.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cefepime Standards
- Cefepime EP Impurity E(HCl) (CAS 103121-85-3)
- Cefepime Dihydrochloride Monohydrate EP Impurity E (CAS 103296-32-8)
- Cefepime EP Impurity C (CAS 104301-63-5)
- Cefepime Impurity 29 (CAS 110-56-5)
- Cefepime EP Impurity E (CAS 110026-16-9)
- Cefepime EP Impurity D Potassium Salt (CAS 112097-97-9)
- Cefepime Impurity 20 (CAS 112533-07-0)
- Cefepime Impurity C56 (CAS 113703-50-7)
Recommended Standards
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- Cholecystokinin, CCK Tetrapeptide (30-33) (CAS 35144-91-3)
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