Candesartan Impurity 5 CAS 897629-28-6
| CAS No. | 897629-28-6 |
| Molecular Formula | C31H30N6O5 |
| Molecular Weight | 566.61 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Candesartan Impurity 5 is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Candesartan Impurity 5 (CAS 897629-28-6) is a certified pharmaceutical impurity reference standard with the molecular formula C31H30N6O5 and a molecular weight of 566.61 g/mol.
Based on its molecular formula C31H30N6O5, Candesartan Impurity 5 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 566.61 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), Candesartan Impurity 5 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 | C31H30N6O5 |
| Molecular Weight | 566.61 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) | 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 18 (CAS CATO-C4X-123418)
- Candesartan Impurity 9 (CAS CATO-C4X-15729)
- Candesartan Cilexetil EP Impurity B (CAS 869631-11-8)
- 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)
- Candesartan Cilexetil EP Impurity C (CAS 1185255-99-5)
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- 4-Ethynylbenzene-1,2-diamine (CAS 58297-31-7)
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