Cefprozil EP Impurity E CAS CATO-C4X-149218
| CAS No. | CATO-C4X-149218 |
| Molecular Formula | C26H26N4O7S |
| Molecular Weight | 538.57 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Cefprozil EP Impurity E 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.
CATO supplies Cefprozil EP Impurity E (CAS CATO-C4X-149218), a pharmacopoeial impurity reference standard (molecular formula C26H26N4O7S, MW 538.57 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Cefprozil EP Impurity E is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 538.57 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C26H26N4O7S |
| Molecular Weight | 538.57 g/mol |
| Purity | 97%+ |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Cefprozil Standards
- Cefprozil EP Impurity H (CAS CATO-C4X-149214)
- Cefprozil EP Impurity J (CAS CATO-C4X-149215)
- Cefprozil Impurity 20 (CAS CATO-C4X-149220)
- Cefprozil Impurity 53 (CAS CATO-C4X-149253)
- Cefprozil Impurity 38 (CAS CATO-C4X-149238)
- Cefprozil Impurity 57 (CAS CATO-C4X-149257)
- Cefprozil Impurity 60 (CAS CATO-C4X-149260)
- Cefprozil Impurity 40 (CAS CATO-C4X-149240)
Recommended Standards
- Ticagrelor Impurity 90 (CAS 2417326-48-6)
- Cortisol 21-beta-D-Glucuronide (CAS 7301-54-4)
- Ticagrelor Impurity 12 (Mixture of Diastereomers) (CAS 1644461-85-7)
- Flomoxef Impurity 3 (CAS 103057-61-0)
- Olanzapine Impurity 42 (CAS 161696-76-0(free base))
- Mirogabalin Impurity 206 (CAS CATO-C4X-2924206)
- Fluconazole Impurity 76 Dimesylate (CAS CATO-C4X-101976)
- Celiprolol Hydrochloride EP Impurity A (CAS 56980-94-0)
- 2-Hydroxy-4-oxopentanoic Acid (CAS 54031-97-9)
- 3-(1,3-Dioxolan-2-yl)-1-(4-ethylphenyl)propan-1-one (CAS 842124-06-5)
- 1-(2-Bromoethenyl)-4-chlorobenzene (CAS 125428-11-7)
- Mivacurium chloride Impurity 74 (CAS CATO-C4X-137574)
- Samidorphan Impurity 9 (CAS 1000410-46-7)
- Semaglutide impurity 204 (CAS CATO-C4X-2226204)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com