Donepezil Impurity 19 CAS 870555-76-3
| CAS No. | 870555-76-3 |
| Molecular Formula | C24H29NO3 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Donepezil Impurity 19.
CATO supplies Donepezil Impurity 19 (CAS 870555-76-3), a certified reference material (molecular formula C24H29NO3C2H2O4, MW 469.53 g/mol) for analytical method development and quality control.
Based on its molecular formula C24H29NO3C2H2O4, Donepezil Impurity 19 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 469.53 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C24H29NO3 C2H2O4 |
| Molecular Weight | 469.53 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
Related Donepezil Standards
- Donepezil Impurity 15 (CAS 1023500-88-0)
- Donepezil Impurity 44 (CAS 1026443-48-0)
- Donepezil Impurity 46 (CAS 1034439-43-4)
- Donepezil-d5 (CAS 1128086-25-8)
- Donepezil Impurity 55 (CAS 1189443-74-0 (free base))
- Donepezil Related Compound A HCl (CAS 120011-69-0)
- Donepezil Hydrochloride (CAS 120011-70-3)
- Donepezil Impurity 25 (CAS 120012-04-6)
Recommended Standards
- 3-(1-Methyl-1H-1,2,4-triazol-5-yl)azetidin-3-ol (CAS 1849287-16-6)
- 2-Methyl-3-(4-methyl-1,2,3-thiadiazole-5-carboxamido)propanoic acid (CAS 1251331-80-2)
- 1-[(4-Methylphenyl)methyl]-2-oxo-5-[3-(trifluoromethyl)phenyl]-1,2-dihydropyridine-3-carbonitrile (CAS 338964-44-6)
- 4-Formylnaphthalene-1-carboxylic acid (CAS 219685-15-1)
- 2-Amino-2-(3,4-difluorophenyl)acetonitrile (CAS 218449-30-0)
- (2S,3R)-3-((R)-1-Hydroxyethyl)-4-oxoazetidine-2-carboxylic acid (CAS 119720-14-8)
- 2-(1H-Indol-3-yl)-N-(2-(methylthio)phenyl)-2-oxoacetamide (CAS 852367-71-6)
- Lenalidomide Impurity 44 (CAS 632340-56-8)
- H-Cys-Arg-Gly-Asp-Phe-Pro-Ala-Ser-Ser-Cys-OH (Disulfide bond) (CAS 166184-23-2)
- (Pro30,Tyr32,Leu34)-Neuropeptide Y (28-36) (CAS 161650-01-7)
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)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com