Pantoprazole Chloromethyl Impurity (Pantoprazole Chloro Impurity, HCl salt), CAS 72830-09-2, is a process-related and degradation impurity encountered in pantoprazole manufacture. Characterized by its chloromethyl substitution on the pantoprazole core, this impurity is critical for impurity profiling, stability studies, and analytical method development. It commonly arises from incomplete alkylation or unintended chlorination of intermediates and may form under acidic or chlorinating conditions. Reliable detection and quantification are achieved by HPLC, LC-MS and NMR techniques, enabling control against ICH Q3 guidelines and specification limits. Accurate reference material and validated analytical methods support quality risk assessments and batch release decisions.
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