Category
Clopidogrel
CAS Number
NA
Molecular Formula
C₇H₈ClNOS
Molecular Weight
189.66 g/mol
Synonym

6,7-Dihydro-5H-thieno[3,2-c]pyridin-4-one Hydrochloride ; 6,7-dihydrothieno [3,2-c]pyridine-4(5H)-one Hydrochloride ; Clopidogrel Impurity 4 (Hydrochloride Salt)

Keywords
Impurities
Pharmaceutical Standards
Miscellaneous compounds
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Clopidogrel Impurity 4 (Hydrochloride Salt) is a specified related impurity found in the antiplatelet drug clopidogrel that can be formed during synthesis, storage, or degradation. It is typically characterized and used as a reference standard in pharmaceutical quality control and analytical testing to detect, identify, and quantify trace levels of this impurity, helping ensure that clopidogrel batches meet regulatory purity and safety requirements.