Donepezil Impurity 75 CAS CATO-C4X-103975
| CAS No. | CATO-C4X-103975 |
| Molecular Formula | C20H25NO |
| Molecular Weight | 295.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Donepezil Impurity 75 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.
As a process- or degradation-related impurity, Donepezil Impurity 75 (CAS CATO-C4X-103975, C20H25NO) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Donepezil Impurity 75 (C20H25NO) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 | C20H25NO |
| Molecular Weight | 295.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Donepezil Standards
- Donepezil impurity 01 (CAS 2452407-68-8)
- Donepezil Impurity 30 (CAS CATO-C4X-103930)
- Donepezil Impurity 39 (CAS 923571-15-7)
- Donepezil Impurity 54 (CAS CATO-C4X-103954)
- Donepezil Alkene Pyridine N-Oxide (CAS 896134-07-9)
- Donepezil Impurity 43 (CAS CATO-C4X-103943)
- Donepezil Impurity 19 (CAS CATO-C4X-103919)
- Donepezil EP impurity A (CAS 120014-30-4)
Recommended Standards
- 4-(1-methyl-1-phenylethyl)phenyl 3-piperidinylether 946681-21-6 (CAS 946681-21-6)
- Tadalafil Impurity 170 (CAS CATO-C4X-1087170)
- tert-butyl N-[3-[(1-aminospiro[3.3]heptan-3-yl)amino]cyclobutyl]carbamate (CAS 2028730-36-9)
- Salbutamol Impurity 75 (CAS 1221726-71-1)
- Elagolix Impurity 106 (CAS CATO-C4X-2068106)
- Tebipenem Impurity 18 (CAS CATO-C4X-134718)
- Vasopressin Impurity 3 (CAS CATO-C4X-23653)
- (7S,8aS)-7-aminohexahydropyrrolo[1,2-a]pyrazine-1,4-dione hydrochloride (CAS 1609388-40-0)
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