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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
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
(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
rac Darifenacin-d4 Stable Isotopes CS-T-73883 1189701-43-6 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Darifenacin Hydrobromide API CS-O-01267 133099-07-7 In Stock
Darifenacin Hydrochloride API CS-EO-03469 586346-94-3 Enquire
Darifenacin API CS-O-14949 133099-04-4 Enquire


Metabolite

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


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Darifenacin 4-Hydroxy Impurity Impurity CS-O-15719 2468796-89-4 Enquire
Darifenacin 7-Bromo Analog Impurity CS-O-15721 1391080-43-5 Enquire
Darifenacin 7-Bromoethyl Impurity Impurity CS-O-15715 1598271-92-1 In Stock
Darifenacin Carboxylic Acid Impurity Impurity CS-O-15716 1048979-16-3 Enquire
Darifenacin Cyano Pyrrolidine Impurity Impurity CS-EO-03467 871505-23-6 Enquire
Darifenacin Cyclic Amide-Impurity E Impurity CS-O-31173 1797983-04-0 In Stock
Darifenacin Dehydro Impurity Impurity CS-O-07750 943034-52-4 In Stock
Darifenacin Impurity 10 (Tartarate salt) Impurity CS-EO-03470 1092540-94-7 Enquire
Darifenacin Impurity 6 Impurity CS-O-16065 133034-07-8 In Stock
Darifenacin Impurity B Impurity CS-O-07747 127264-14-6 In Stock
Darifenacin Impurity C Impurity CS-O-10800 252317-48-9 In Stock
Darifenacin Nitrile Impurity Impurity CS-O-15761 608127-89-5 In Stock
Darifenacin Nitrile Impurity (HCl) Impurity CS-EO-03468 252317-48-9 (Freebase) Enquire
Darifenacin Open chain Impurity CS-O-16014 Not Available In Stock
Darifenacin Pyrrolidin Carboxylic Acid Impurity Impurity CS-O-15722 1050646-75-7 In Stock
Darifenacin Pyrrolidinium Dimer Acetonitrile Impurity Impurity CS-O-15821 ---- In Stock
Darifenacin Vinylbenzofuran Impurity Impurity CS-O-15720 633335-98-5 In Stock
(N-((S)-3(2-amino-2oxo-1,1diphenylethyl)pyrrolidin-1-yl)-2-(... Impurity CS-O-31174 Not Available Enquire
(R)-Darifenacin Impurity CS-T-51609 133099-05-5 Enquire
(R)-Darifenacin Hydrobromide Impurity CS-T-51608 1092800-15-1 Enquire
2-Oxodarifenacin Impurity CS-T-83995 133034-08-9 Enquire
7-Bromo Darifenacin Hydrochloride Impurity CS-O-16125 1391080-43-5 (Freebase) Enquire
Benzofuran-5-yl-Acetic Acid Impurity CS-P-07254 142935-60-2 Enquire
Darifenacin 3-Hydroxy Impurity Impurity CS-O-16063 206048-82-0 Enquire
Darifenacin 4-Hydroxy Impurity Impurity CS-EO-01229 2468796-89-4 Enquire
Darifenacin acid Impurity CS-O-15990 1048979-16-3 Enquire
Darifenacin Cyano Impurity Impurity CS-O-07749 1159977-31-7 Enquire
Darifenacin Dimer-1 Impurity Impurity CS-O-07751 Not Available Enquire
Darifenacin Dimer-2 Impurity Impurity CS-O-07752 Not Available Enquire
Darifenacin Impurity 11 Impurity CS-EO-01949 1229355-35-4 Enquire
Darifenacin Oxidized Impurity Impurity CS-P-07660 133033-99-5 Enquire
Darifenacin Pyrrolidine Impurity Racemate Impurity CS-O-07754 103887-32-7 Enquire
Darifenacin Pyrrolidinium Dimer Impurity Impurity CS-O-15717 1396968-57-2 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(2,3-dihydrobenzofuran-5-yl) ethanone Intermediate CS-O-15572 90843-31-5 In Stock
2,3-dihydrobenzofuran-5-acetic acid Intermediate CS-O-30847 69999-16-2 In Stock
5-(2-bromoethyl)Benzofuran Intermediate CS-O-15714 133034-06-7 In Stock


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-(1-nitrosopyrrolidin-3-yl)-2,2-diphenylacetamide Nitrosamine CS-O-46481 Not Available Enquire
2-(1-nitrosopyrrolidin-3-yl)-2,2-diphenylacetonitrile Nitrosamine CS-O-46480 Not Available Enquire
Darifenacin nitroso impurity Nitrosamine CS-O-43262 Not Available In Stock