Candesartan Cilexetil Impurity 16 CAS 934495-65-5
| CAS No. | 934495-65-5 |
| Molecular Formula | C50H44N6O6 |
| Molecular Weight | 824.92 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Candesartan Cilexetil Impurity 16 (CAS 934495-65-5) is a certified pharmaceutical impurity reference standard with the molecular formula C50H44N6O6 and a molecular weight of 824.92 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Candesartan Cilexetil Impurity 16 is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 824.92 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C50H44N6O6 |
| Molecular Weight | 824.92 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) | 32.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 6 |
Related Candesartan Standards
- Candesartan Cilexetil Impurity 17 (CAS 1798004-41-7)
- Candesartan Impurity 11 (CAS CATO-C4X-157211)
- Candesartan Cilexetil Impurity 18 (CAS 886999-34-4)
- Candesartan Cilexetil EP Impurity H (CAS 170791-09-0)
- Candesartan Cilexetil Impurity 41 (CAS CATO-C4X-123441)
- Candesartan Trityl Ester N1-Trityl Analog (CAS 1215772-81-8)
- Candesartan Cilexetil Impurity 44 (CAS CATO-C4X-123444)
- Candesartan Cilexetil Impurity 15 (CAS 1797985-81-9)
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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
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com