Sertraline Tetralone Racemate (CAS 79560-19-3), also known as 4-(3,4-dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenone or 4-(3,4-dichlorophenyl)tetralin-1-one, is a stereoisomeric impurity encountered in sertraline manufacture. As a tetralone intermediate, it can persist due to incomplete reduction or racemization during synthesis and affects enantiomeric purity, residual solvent profile, and downstream crystallization behavior. Accurate identification and quantification by HPLC, chiral HPLC, LC-MS and NMR are essential for impurity profiling and specification setting in accordance with ICH guidelines. Removal is typically achieved through optimized reaction control, targeted purification by chromatography or recrystallization, and validation of analytical methods to ensure batch consistency.
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