Candesartan Cilexetil EP Impurity E CAS 914613-35-7
| CAS No. | 914613-35-7 |
| Molecular Formula | C35H38N6O6 |
| Molecular Weight | 638.71 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Candesartan Cilexetil EP Impurity E (CAS 914613-35-7), a pharmacopoeial impurity reference standard (molecular formula C35H38N6O6, MW 638.71 g/mol) used for the identification and quantification of trace impurities in APIs.
Candesartan Cilexetil EP Impurity E (C35H38N6O6) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C35H38N6O6 |
| Molecular Weight | 638.71 g/mol |
| Purity | >95% |
| 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) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 6 |
Related Candesartan Standards
- Candesartan Cilexetil Impurity 21 (CAS CATO-C4X-123421)
- Candesartan Cilexetil Impurity 22 (CAS 1391054-45-7)
- Candesartan Cilexetil EP Impurity F (CAS 914613-36-8)
- Candesartan Cilexetil Impurity 34 (CAS CATO-C4X-123434)
- Candesartan Impurity 7 (CAS CATO-C4X-15727)
- Candesartan Cilexetil Impurity 35 (CAS 1867269-67-7)
- Candesartan N2-Glucuronide (CAS 180603-76-3)
- Candesartan Cilexetil (CAS 145040-37-5)
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- 5-Fluoro-1H-indole-3-carbonitrile (CAS 194490-15-8)
- Olopatadine lmpurity 62 (CAS CATO-C4X-171863)
- 3-Isopropyl-2,3-dihydro-1h-inden-1-ol (CAS 52958-17-5)
- Vericiguat Impurity 1 (CAS 1350653-30-3)
- Osmanthuside H (CAS 149155-70-4)
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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