Cefprozil EP Impurity K-Isomer 3 CAS CATO-C4X-149223
| CAS No. | CATO-C4X-149223 |
| Molecular Formula | C18H19N3O5S |
| Molecular Weight | 389.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Cefprozil EP Impurity K-Isomer 3 (CAS CATO-C4X-149223, C18H19N3O5S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C18H19N3O5S, Cefprozil EP Impurity K-Isomer 3 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 389.43 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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), Cefprozil EP Impurity K-Isomer 3 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 | C18H19N3O5S |
| Molecular Weight | 389.43 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cefprozil Standards
- Cefprozil Impurity N1(Z-Cefprozil) (CAS 121412-77-9)
- Cefprozil (CAS 92665-29-7)
- Cefprozil Δ3 Isomer (CAS 1000980-59-5)
- Cefprozil EP Impurity K-Isomer 1 (CAS CATO-C4X-149216)
- Cefprozil (E)-Isomer (CAS 92676-86-3)
- Cefprozil EP Impurity K-Isomer 2 (CAS CATO-C4X-149222)
- Cefprozil EP Impurity K-Isomer 4 (CAS CATO-C4X-149224)
- Cefprozil EP Impurity K Mixture(Isomer 1,2,3,4) (CAS CATO-C4X-149226)
Recommended Standards
- Cefprozil Impurity 35 (CAS CATO-C4X-149235)
- Cefprozil (Z)-Isomer Impurity 44 (CAS CATO-C4X-149244)
- Tert-butyl (R)-3-(2-((4,4,4-trifluorobutyl)sulfonyl)ethyl)morpholine-4-carboxylate (CAS 2306246-54-6)
- Cefprozil (Z)-isomer Impurity 48 (CAS CATO-C4X-149248)
- HydroquinoneImpurity 7 (CAS CATO-C4X-25987)
- Bicalutamide EP Impurity C (CAS 906008-94-4)
- Landiolol Impurity 80 (CAS CATO-C4X-262180)
- 2'-Chloro-[1,1'-biphenyl]-2-carboxylicacid (CAS 14498-95-4)
- 2-(Benzyloxy)-6-(chloromethyl)isonicotinonitrile (CAS 1393540-81-2)
- N-(3-methoxyphenyl)-2-phenoxyacetamide (CAS 331270-73-6)
- 1,2,3,4,5-Pentabromo-6-chlorobenzene (CAS 13075-05-3)
- 2-Isopropyl-5-methyl-1H-imidazo[4,5-b]pyridin-7-ol (CAS 79899-04-0)
- Ethyl (4-(2-((4-chlorophenyl)amino)-2-oxoethyl)thiazol-2-yl)carbamate (CAS 946314-33-6)
- Peptide Impurity 41 (CAS CATO-CPTD788841)
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