clopidogrel and its Impurities
Clopidogrel is sold under the trade name Plavix among others. It is an antiplatelet medication used to reduce the risk of heart disease and stroke in those at high risk.. Reference standards of Clopidogrel API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below


Clopidogrel Related Compound C (methyl (-)-(R)-(o-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5( (1140600)
Clopidogrel Related Compound C (methyl (-)-(R)-(o-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5( (1140600)
Catalogue No.:PA USP1140600
CAS :
120202-71-3
Molecular Formula : NA
Molecular Weight : NA


Clopidogrel Related Compound A ((+)-(S)-(o-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-ace (1140586)
Clopidogrel Related Compound A ((+)-(S)-(o-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-ace (1140586)
Catalogue No.:PA USP1140586
CAS :
144750-42-5
Molecular Formula : NA
Molecular Weight : NA


Clopidogrel Related Compound B (Methyl(+/-)-(o-chlorophenyl)-4,5-dihydrothieno[2,3-c]pyridine-6(7H) (1140597)
Clopidogrel Related Compound B (Methyl(+/-)-(o-chlorophenyl)-4,5-dihydrothieno[2,3-c]pyridine-6(7H) (1140597)
Catalogue No.:PA USP1140597
CAS :
144750-52-7
Molecular Formula : NA
Molecular Weight : NA


5-(1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine-3-sulfonic Acid
5-(1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine-3-sulfonic Acid
Catalogue No.:PA 03 67590
CAS :
NA
Molecular Formula : C16H16ClNO5S2
Molecular Weight : 401.88


(3E)-4-(Acetylthio)-α-(2-chlorophenyl)-3-(2-ethoxy-2-oxoethylidene)-1-piperidineacetic Acid Methyl Ester (Mixture of Diastereomers)
(3E)-4-(Acetylthio)-α-(2-chlorophenyl)-3-(2-ethoxy-2-oxoethylidene)-1-piperidineacetic Acid Methyl Ester (Mixture of Diastereomers)
Catalogue No.:PA 03 67620
CAS :
204204-75-1
Molecular Formula : C20H24ClNO5S
Molecular Weight : 425.93

![4-Chloro-3-(1-(6,7-dihydrothieno[3,2-c]pyridin-5(4 PA 03 67630](https://www.pharmaffiliates.com/pimages/PA0367630.jpg)
4-Chloro-3-(1-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)-2-methoxy-2-oxoethyl)benzenesulfonic Acid
4-Chloro-3-(1-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)-2-methoxy-2-oxoethyl)benzenesulfonic Acid
Catalogue No.:PA 03 67630
CAS :
2418591-19-0
Molecular Formula : C16H16ClNO5S2
Molecular Weight : 401.88


Methyl 2-(2-chlorophenyl)-2-(4,5-dihydrothieno[2,3-c]pyridin-6(7H)-yl)Acetate Hydrobromide
Methyl 2-(2-chlorophenyl)-2-(4,5-dihydrothieno[2,3-c]pyridin-6(7H)-yl)Acetate Hydrobromide
Catalogue No.:PA 03 0681000
CAS :
1416438-02-2
Molecular Formula : C16H17BrClNO2S
Molecular Weight : 402.73


5-((S)-1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine 5-oxide
5-((S)-1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine 5-oxide
Catalogue No.:PA 30 0231003
CAS :
1319197-71-1
Molecular Formula : C16H16ClNO3S
Molecular Weight : 337.82


(S)-1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl (R)-2-(2-chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetate sulfate
(S)-1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl (R)-2-(2-chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetate sulfate
Catalogue No.:PA 03 0681002
CAS :
NA
Molecular Formula : C24H23Cl2NO8S2
Molecular Weight : 588.47


(S)-5-(1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine-2-sulfonic acid
(S)-5-(1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine-2-sulfonic acid
Catalogue No.:PA 03 0671012
CAS :
2173294-69-2
Molecular Formula : C16H16ClNO5S2
Molecular Weight : 401.88


Methyl 2-(2-chlorophenyl)-2-(4,7-dihydrothieno[2,3-c]pyridin-6(5H)-yl)Acetate Hydrochloride
Methyl 2-(2-chlorophenyl)-2-(4,7-dihydrothieno[2,3-c]pyridin-6(5H)-yl)Acetate Hydrochloride
Catalogue No.:PA 30 0231005
CAS :
144750-52-7
Molecular Formula : C16H17Cl2NO2S
Molecular Weight : 358.28