Donepezil Impurity 33 (E/Z Mixture) CAS 149874-91-9
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 149874-91-9 |
| Molecular Formula | C17H21NO3 |
| Molecular Weight | 287.35 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Donepezil Impurity 33 (E/Z Mixture) (CAS 149874-91-9) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C17H21NO3. Molecular weight: 287.35 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C17H21NO3 |
| Molecular Weight | 287.35 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
| Nitrogen Atoms | 1 |
Related Donepezil Standards
- Donepezil EP impurity A (CAS 120014-30-4)
- Donepezil EP impurity D (CAS 4803-57-0)
- Donepezil Impurity 19 (CAS CATO-C4X-103919)
- Donepezil Impurity 48 (CAS 4803-74-1)
- Donepezil Impurity 75 (CAS CATO-C4X-103975)
- Donepezil impurity 01 (CAS 2452407-68-8)
- Donepezil Impurity 30 (CAS CATO-C4X-103930)
- Donepezil Impurity 39 (CAS 923571-15-7)
Recommended Standards
- 5-(((4-hydroxyphenethyl)(methyl)amino)methyl)-2-methoxyphenol (CAS 94753-90-9)
- Dobutamine Impurity 52 (CAS 1059182-81-8)
- CAS CATO-C3D-262796 (CAS CATO-C3D-262796)
- Cefoxitin Impurity 14 (CAS CATO-C4X-157814)
- Nintedanib Impurity 15 (CAS 1160293-25-3)
- 1-(2,4-Dimethylphenyl)-2-hydroxyethan-1-one (CAS 1250296-53-7)
- 2-(3-Methyl-1,2,4-oxadiazol-5-yl)-6,7-dihydropyrazolo[1,5-a]pyridin-4(5H)-one (CAS 1708079-80-4)
- 3-(4-Methoxybenzoyl)propionic Acid (CAS 3153-44-4)
- (Des-Asp187,Met186)-Melanocyte Protein PMEL 17 (185-193) (human, bovine, mouse) (H-4362.0001) (CAS 255710-51-1)
- Semaglutide impurity 286 (CAS CATO-C4X-2226286)
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