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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Darifenacin, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Darifenacin 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 Darifenacin-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.

Darifenacin Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(R)​-​Darifenacin-d4 Stable Isotopes CS-T-73395 1261734-81-9 Enquire
(R)-Darifenacin-d4 Hydrobromide Stable Isotopes CS-T-51610 1261394-25-5 Enquire
Darifenacin-d4 Stable Isotopes CS-P-07657 1095598-84-7 In Stock
Darifenacin-d4 Hydrobromide Stable Isotopes CS-O-00698 2714474-01-6 In Stock
Darifenacin-d4 Hydrochloride Stable Isotopes CS-O-03226 1095598-84-7 (Freebase) In Stock
rac Darifenacin-d4 Stable Isotopes CS-T-73883 1189701-43-6 Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Darifenacin API Standards CS-O-14949 133099-04-4 Enquire
Darifenacin Hydrobromide API Standards CS-O-01267 133099-07-7 In Stock


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
7-Bromo Darifenacin Metabolites CS-O-15283 1391080-43-5 In Stock
Darifenacin N-Oxide (Mixture of Diasteromers) Metabolites CS-O-14951 1391080-40-2 In Stock


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(N-((S)-3(2-amino-2oxo-1,1diphenylethyl)pyrrolidin-1-yl)-2-(... Impurities CS-O-31174 Not Available Enquire
(R)-Darifenacin Impurities CS-T-51609 133099-05-5 Enquire
(R)-Darifenacin Hydrobromide Impurities CS-T-51608 1092800-15-1 Enquire
2-(1-nitrosopyrrolidin-3-yl)-2,2-diphenylacetamide Impurities CS-O-46481 Not Available Enquire
2-Oxodarifenacin Impurities CS-T-83995 133034-08-9 Enquire
7-Bromo Darifenacin Hydrochloride Impurities CS-O-16125 *1391080-43-5 Enquire
Darifenacin 3-Hydroxy Impurity Impurities CS-O-16063 206048-82-0 Enquire
Darifenacin 4-Hydroxy Impurity Impurities CS-O-15719 2468796-89-4 Enquire
Darifenacin 7-Bromo Analog Impurities CS-O-15721 1391080-43-5 Enquire
Darifenacin 7-Bromoethyl Impurity Impurities CS-O-15715 1598271-92-1 In Stock
Darifenacin acid Impurities CS-O-15990 1048979-16-3 Enquire
Darifenacin Carboxylic Acid Impurity Impurities CS-O-15716 1048979-16-3 Enquire
Darifenacin Cyano Impurity Impurities CS-O-07749 1159977-31-7 Enquire
Darifenacin Cyclic Amide-Impurity E Impurities CS-O-31173 1797983-04-0 In Stock
Darifenacin Dehydro Impurity Impurities CS-O-07750 943034-52-4 In Stock
Darifenacin Dimer-1 Impurity Impurities CS-O-07751 Not Available Enquire
Darifenacin Dimer-2 Impurity Impurities CS-O-07752 Not Available Enquire
Darifenacin Impurity 10 (Tartarate salt) Impurities CS-EO-03470 1092540-94-7 Enquire
Darifenacin Impurity 11 Impurities CS-EO-01949 1229355-35-4 Enquire
Darifenacin Impurity 6 Impurities CS-O-16065 133034-07-8 In Stock
Darifenacin Impurity B Impurities CS-O-07747 127264-14-6 In Stock
Darifenacin Impurity C Impurities CS-O-10800 252317-48-9 In Stock
Darifenacin Nitrile Impurity Impurities CS-O-15761 608127-89-5 In Stock
Darifenacin Nitrile Impurity (HCl) Impurities CS-EO-03468 252317-48-9 (Freebase) Enquire
Darifenacin nitroso impurity Impurities CS-O-43262 Not Available In Stock
Darifenacin Open chain Impurities CS-O-16014 Not Available In Stock
Darifenacin Oxidized Impurity Impurities CS-P-07660 133033-99-5 Enquire
Darifenacin Pyrrolidin Carboxylic Acid Impurity Impurities CS-O-15722 1050646-75-7 In Stock
Darifenacin Pyrrolidine Impurity Racemate Impurities CS-O-07754 103887-32-7 Enquire
Darifenacin Pyrrolidinium Dimer Acetonitrile Impurity Impurities CS-O-15821 Not Available In Stock
Darifenacin Pyrrolidinium Dimer Impurity Impurities CS-O-15717 1396968-57-2 Enquire
Darifenacin R-Isomer (HCl) Impurities CS-EO-03466 133099-05-5 (Freebase) Enquire
Darifenacin Vinylbenzofuran Impurity Impurities CS-O-15720 633335-98-5 In Stock


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2,3-dihydrobenzofuran-5-acetic acid Intermediates CS-O-30847 69999-16-2 In Stock
5-(2-bromoethyl)Benzofuran Intermediates CS-O-15714 133034-06-7 In Stock
Rac-3-Hydroxy Darifenacin Intermediates CS-T-55791 1285875-62-8 Enquire