Cefoperazone EP Impurity A CAS 73240-08-1
| CAS No. | 73240-08-1 |
| Molecular Formula | C23H23N5O8S |
| Molecular Weight | 529.52 g/mol |
| 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 Cefoperazone EP Impurity A.
As a process- or degradation-related impurity, Cefoperazone EP Impurity A (CAS 73240-08-1, C23H23N5O8S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C23H23N5O8S, Cefoperazone EP Impurity A 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 529.52 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.
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 | C23H23N5O8S |
| Molecular Weight | 529.52 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Cefoperazone Standards
- Cefoperazone Impurity N3 (CAS 73240-09-2)
- Cefoperazone Impurity 17 (CAS CATO-C4X-114917)
- Cefoperazone Impurity 32 (CAS CATO-C4X-114932)
- Cefoperazone Impurity 12 (CAS 698339-10-5)
- Cefoperazone Ring Opening Lactone (CAS CATO-C4X-114920)
- Cefoperazone Impurity 57 (CAS CATO-C4X-114957)
- Cefoperazone Impurity 41 (CAS CATO-C4X-114941)
- Cefoperazone Impurity 65 (CAS CATO-C4X-114965)
Recommended Standards
- Regorafenib Impurity 9 (CAS CATO-C4X-10479)
- Nilotinib Hydrochloride Monohydrate EP Impurity H (CAS 641571-15-5)
- N-((5-((2-((4-Fluorophenyl)amino)-2-oxoethyl)thio)-4-(3-(trifluoromethyl)phenyl)-4H-1,2,4-triazol-3-yl)methyl)benzamide (CAS 393839-83-3)
- Nilotinib (CAS 641571-10-0)
- Mianserin impurity 35 (CAS CATO-C4X-136935)
- Luliconazole impurity 28 (CAS CATO-C4X-285328)
- Amlodipine Impurity 139 (CAS CATO-C4X-1095139)
- (2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)diphenylphosphine oxide (CAS 445380-60-9)
- 4,8-Dimethyl-2-morpholinoquinoline-6-carbaldehyde (CAS 89446-48-0)
- 1-(4-Fluorophenyl)-3-(pyrrolidin-3-yl)urea (CAS 1154968-68-9)
- 3-Aminobutane-2-thiol (CAS 4146-17-2)
- 4-(Heptylsulfanyl)benzoic acid (CAS 32910-58-0)
- 2-Benzyltryptamine (CAS 22294-23-1)
- Des-Pro36-Tirzepatide (CAS CATO-CPTD788937)
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