Impurity reference standards
Donepezil impurities & reference standards
Characterised Donepezil impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
58reference materials
4isotope-labelled
COAHPLC · NMR · MS on request
1-Benzyl-4-(5,6-dimethoxy-1-oxoindan-2-yl)methylene-1,2,3,4-tetrahydropyridine
- CAS
- 1020661-51-1
- Formula
- C24H25NO3
- MW
- 375.5 g/mol
VQ-048079
2-((1-Benzylpiperidin-4-yl)methyl)-2-hydroxy-5,6-dimethoxy-2,3-dihydro-1H-inden-1-one
- CAS
- 329010-67-5
- Formula
- C24H29NO4
- MW
- 395.5 g/mol
VQ-030282
2-Isonicotinoyl-5,6-dimethoxy-2,3-dihydro-1H-inden-1-one
- CAS
- 923571-15-7
- Formula
- C17H15NO4
- MW
- 297.3 g/mol
VQ-030281
![2,3-Dihydro-5,6-dimethoxy-2-[(1-oxido-4-pyridinyl)methylene]-1H-inden-1-one chemical structure](/media/structures/AKKASSPRDCJTET-QPEQYQDCSA-N.svg)
2,3-Dihydro-5,6-dimethoxy-2-[(1-oxido-4-pyridinyl)methylene]-1H-inden-1-one
- CAS
- 896134-06-8
- Formula
- C17H15NO4
- MW
- 297.3 g/mol
VQ-022427
4-((5,6-Dimethoxy-2,3-dihydro-1H-inden-2-yl)methyl)piperidine
- CAS
- 844694-83-3
- Formula
- C17H25NO2
- MW
- 275.4 g/mol
VQ-048073
5,6-Dimethoxy-2-(4-piperidinyl)methyleneindan-1-one
- CAS
- 149874-91-9
- Formula
- C17H21NO3
- MW
- 287.35 g/mol
VQ-036782
![5,6-Dimethoxy-2-[(4-piperidyl)methyl]indane hydrochloride chemical structure](/media/structures/FFYMHPLMHJQXRY-UHFFFAOYSA-N.svg)
5,6-Dimethoxy-2-[(4-piperidyl)methyl]indane hydrochloride
- CAS
- 1034439-43-4
- Formula
- C17H26ClNO2
- MW
- 311.8 g/mol
VQ-030280
FAQs — Donepezil impurities
Which Donepezil impurities do you supply?
We list 58 Donepezil-related reference materials, including process impurities, degradation products, stable-isotope-labelled standards and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Donepezil impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Donepezil impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Donepezil impurity standards
We reply within one business day with price, pack options, lead time and documentation.