Cefprozil Impurity 63 CAS CATO-C4X-149263
| CAS No. | CATO-C4X-149263 |
| Molecular Formula | C18H18N2O4S |
| Molecular Weight | 358.41 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 Cefprozil Impurity 63.
CATO supplies Cefprozil Impurity 63 (CAS CATO-C4X-149263), a pharmacopoeial impurity reference standard (molecular formula C18H18N2O4S, MW 358.41 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Cefprozil Impurity 63 (C18H18N2O4S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), Cefprozil Impurity 63 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 | C18H18N2O4S |
| Molecular Weight | 358.41 g/mol |
| Purity | ≥95% |
| 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 | 2 |
| Sulfur Atoms | 1 |
Related Cefprozil Standards
- Cefprozil Impurity 58 (CAS CATO-C4X-149258)
- Cefprozil Impurity 59 (CAS CATO-C4X-149259)
- Cefprozil Impurity 56 (CAS CATO-C4X-149256)
- Cefprozil Impurity 62 (CAS CATO-C4X-149262)
- Cefprozil Impurity 41 (CAS CATO-C4X-149241)
- Cefprozil Impurity 55 (CAS CATO-C4X-149255)
- Cefprozil Impurity N1(Z-Cefprozil) (CAS 121412-77-9)
- Cefprozil (CAS 92665-29-7)
Recommended Standards
- Lemborexant Impurity 24 (CAS CATO-C4X-304224)
- Lemborexant Impurity 47 (CAS CATO-C4X-304247)
- Omeprazole impurity 31 (CAS CATO-C4X-125531)
- 5-(4-((3,5-Dimethyl-4-nitro-1h-pyrazol-1-yl)methyl)phenyl)-4-ethyl-4h-1,2,4-triazole-3-thiol (CAS 1001756-34-8)
- Maxacalcitol Impurity 10 (CAS CATO-C4X-278810)
- Naltrexone EP Impurity A (CAS 1007856-83-8)
- Thioctic Acid EP Impurity A (CAS 1204245-29-3)
- (E)-3-[2-(5-Tetrazolyl)vinyl]-6-fluoro-1H-indole (CAS 1316695-35-8)
- 2-(3-Methoxyphenyl)-N-[4-(methylthio)benzyl]ethanamine (CAS 356091-89-9)
- N-(2-(4-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)piperazin-1-yl)pyridin-3-yl)-4-methylbenzamide (CAS 478262-12-3)
- 2-Amino-1-(3,4,5-trimethoxyphenyl)ethan-1-one (CAS 13079-19-1)
- Rizatriptan EP Impurity C HCl (CAS CATO-C4X-17527)
- 4-(Difluoromethyl)-5,6-dihydroxypyridine-2-sulfonamide (CAS 1805008-99-4)
- Semaglutide impurity 65 (CAS CATO-C4X-222665)
Why CATO?
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com