Donepezil Impurity 40 CAS 923571-16-8
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 923571-16-8 |
| Molecular Formula | C24H22NO4 |
| Molecular Weight | 388.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Order Donepezil Impurity 40 (CAS 923571-16-8) pharmacopoeial impurity standards reference standard from CATO: ISO 17034 accredited producer, 130,000+ catalog items in stock. Molecular formula: C24H22NO4. Molecular weight: 388.44 g/mol. COA included with every batch.
Physical & Chemical Properties
| Molecular Formula | C24H22NO4 |
| Molecular Weight | 388.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 14.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
Related Donepezil Standards
- Donepezil D7 (CAS 1215071-00-3)
- Donepezil-d5 (CAS 1128086-25-8)
- Donepezil Impurity 15 (CAS 1023500-88-0)
- Donepezil Impurity 51 (CAS CATO-C4X-103951)
- Donepezil Impurity 53 (CAS 149874-81-7)
- Donepezil Impurity 74 (CAS CATO-C4X-103974)
- Donepezil Impurity 25 (CAS 120012-04-6)
- Donepezil Impurity 31 (CAS 2097683-67-3)
Recommended Standards
- N1-Cyclopentyl-N2-(5,5-dioxido-2-phenyl-2,6-dihydro-4H-thieno[3,4-c]pyrazol-3-yl)oxalamide (CAS 899961-38-7)
- Rabeprazole impurity 46 (CAS CATO-C4X-112146)
- N,N-Diphenyl-2-((5-(pyridin-3-yl)-1,3,4-oxadiazol-2-yl)thio)acetamide (CAS 332385-05-4)
- Topramezone Impurity 3 (CAS CATO-C4X-35033)
- Marbofloxacin EP Impurity E (CAS 2249835-04-7)
- 2-Bromo-4-chloro-5-(trifluoromethyl)pyridine (CAS 1211587-96-0)
- 5-(4-Butoxyphenyl)-2-(p-tolyl)-3H-benzo[e][1,2,4]triazepine (CAS 444153-13-3)
- 2-Phenyl-1H-pyrazol-3(2H)-one (CAS 7456-81-7)
- 1-(Bromomethyl)-2,3,4-trimethoxybenzene (CAS 80054-01-9)
- Semaglutide impurity 94 (CAS CATO-C4X-222694)
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)
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