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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Donepezil, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Donepezil impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Donepezil-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Donepezil Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Hydroxy Donepezil-d5 (Donepezil Impurity) Stable Isotopes CS-T-100210 2714418-15-0 Enquire
3-Keto Donepezil-d6 Stable Isotopes CS-T-101204 Not Available Enquire
Desbenzyl Donepezil-13C3 Stable Isotopes CS-T-101090 - Enquire
Donepezil-13C3 Hydrochloride Stable Isotopes CS-T-95704 1246814-90-3 Enquire
Donepezil-13C6 Stable Isotopes CS-T-103402 120014-06-4(unlabelled) Enquire
6-O-Desmethyl Donepezil Hydrochloride -D5 Stable Isotopes CS-SN-00024 Not Available Enquire
6-O-Desmethyl Donepezil-d5 Stable Isotopes CS-T-95243 1189443-74-0 Enquire
Donepezil O-Benzyl Enol Ether-d7 Stable Isotopes CS-T-100370 Not Available Enquire
Donepezil-d4 Hydrochloride Stable Isotopes CS-EV-00005 1219798-88-5 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Donepezil hydrochloride monohydrate API CS-ED-01036 884740-09-4 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-benzyl-4-((1,5,6-trimethoxy-1H-inden-2-yl)methyl)piperidin... Impurity CS-O-36060 Not Available In Stock
1-Benzyl-4-(5,6-dimethoxy-1-oxoindan-2-yl)methylpyridinium B... Impurity CS-T-48865 231283-82-2 In Stock
5,6-Dimethoxy-2-(4-pyridylmethylene)-1-indanone Impurity CS-T-19570 4803-74-1 In Stock
Donepezil EP Impurity A Impurity CS-O-10626 120014-30-4 In Stock
Donepezil EP Impurity C Impurity CS-EO-01717 2452407-76-8 Enquire
Donepezil Impurity 13 Impurity CS-EO-02285 608511-44-0 Enquire
Donepezil Impurity G HCl Impurity CS-O-35676 608511-39-3 In Stock
Donepezil Open Ring Impurity (sodium salt) Impurity CS-EO-03500 197010-25-6 (Freebase) Enquire
Donepezil Open Ring Impurity HCl salt Impurity CS-O-51631 2217617-87-1 Enquire
5,6-dimethoxy-2-((6-methylpyridin-2-yl)methylene)-2,3-dihydr... Impurity CS-O-41228 Not Available Enquire
5,6-Dimethoxy-2-(1,2,3,6-tetrahydropyridin-4-ylmethyl)-2,3-d... Impurity CS-O-38607 Not Available Enquire
5,6-Dimethoxy-2-[(4-piperidyl)methyl]indane Hydrochloride Impurity CS-T-19571 1034439-43-4 Enquire
Donepenil EP Impurity C Impurity CS-EO-00372 Not Available Enquire
Donepezil alkene pyridine N-Oxide Impurity CS-T-90594 896134-06-8 Enquire
Donepezil Alkene Pyridine N-oxide Impurity CS-O-36723 2452407-68-8 Enquire
Donepezil EP Impurity G Impurity CS-EO-01080 2452407-72-4 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
5,6-Dimethoxy-1-indanone Intermediate CS-M-56599 2107-69-9 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-Chloro-3-(3,4-dimethoxyphenyl)-3-oxopropane Fine Chemicals CS-MM-06958 4693-38-3 Enquire
2-((1-Benzylpiperidin-4-yl)methyl)-2-hydroxy-5,6-dimethoxy-2... Fine Chemicals CS-O-36948 329010-67-5 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Donepezil N-Nitroso Impurity Nitrosamine CS-EO-02148 ---- In Stock


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(E)-2-[(1-Benzylpiperidin-4-yl)methylene]-5,6-dimethoxyindan... Secondary Standards CS-SS-24949-50MG 145546-80-1 Enquire
Desbenzyl donepezil hydrochloride Secondary Standards CS-SS-24950-50MG 120013-39-0 Enquire
Donepezil Hydrochloride Secondary Standards CS-SS-24556-1GM 120011-70-3 Enquire