Candesartan Cilexetil Impurity 18 CAS CATO-C4X-123418
| CAS No. | CATO-C4X-123418 |
| Molecular Formula | C30H32N6O5 |
| Molecular Weight | 556.61 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Candesartan Cilexetil Impurity 18 (CAS CATO-C4X-123418) is a certified pharmaceutical impurity reference standard with the molecular formula C30H32N6O5 and a molecular weight of 556.61 g/mol.
The molecular framework of Candesartan Cilexetil Impurity 18 (C30H32N6O5) is characterized by a steroid core, an amide 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 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).
As a certified reference material (CRM), Candesartan Cilexetil Impurity 18 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 | C30H32N6O5 |
| Molecular Weight | 556.61 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 6 |
Related Candesartan Standards
- Candesartan Impurity 9 (CAS CATO-C4X-15729)
- Candesartan Impurity 5 (CAS 897629-28-6)
- Candesartan Cilexetil EP Impurity B (CAS 869631-11-8)
- Candesartan Impurity 10 (CAS CATO-C4X-157210)
- Candesartan Cilexetil Methoxy Analog (CAS 1026042-12-5)
- Candesartan Impurity 6 (CAS CATO-C4X-15726)
- Candesartan Cilexetil Impurity 45 (CAS 1821385-89-0)
- Candesartan Cilexetil (CAS 145040-37-5)
Recommended Standards
- O-Desmethyl Midostaurin (CGP62221) (CAS 740816-86-8)
- (S)-Methyl 5-(2,3-bis((benzyloxy)carbonyl)guanidino)-2-((tert-butoxycarbonyl)amino)pentanoate (CAS 899442-96-7)
- Irinotecan Impurity 29 (CAS CATO-C4X-166729)
- (11AS,11a'S)-8,8'-(propane-1,3-diylbis(oxy))bis(7-methoxy-2-methylene-1,2,3,11a-tetrahydro-5H-benzo[e]pyrrolo[1,2-a][1,4]diazepin-5-one) (CAS 232931-57-6)
- Terbutaline Impurity 79 (CAS CATO-C4X-118379)
- HISTIDINE impurity 4 (CAS CATO-C4X-32394)
- Carfilzomib Impurity 87 (CAS CATO-C4X-102287)
- N-(4-(Benzo[d]oxazol-2-yl)phenyl)-5-chlorothiophene-2-carboxamide (CAS 477503-79-0)
- 6-Bromo-9-(tetrahydrofuran-2-yl)-9H-purine (CAS 91003-84-8)
- 3-(2-Fluoro-5-methylpyridin-4-yl)propan-1-amine (CAS 1393561-89-1)
- 3-Chloro-2-(5-(methylsulfonyl)-3-(trifluoromethyl)-1H-1,2,4-triazol-1-yl)-5-(trifluoromethyl)pyridine (CAS 1823183-57-8)
- 2-(2-Chloro-4-nitrophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1426804-80-9)
- Methyl 5-bromo-3-(4-fluorophenyl)imidazo[1,2-a]pyridine-2-carboxylate hydrochloride (CAS 1355082-41-5)
- Insulin Degludec Impurity 6 (CAS CATO-C4X-21576)
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