Ranitidine Impurity F HCl

Ranitidine Impurity F HCl is a thiazole-containing synthetic byproduct arising from the amidation step in ranitidine production. It features a 5-(2-aminoethyl)thiazole core linked to a chloroacetyl chloride moiety, lacking the furan ring present in the parent drug. The compound exhibits a zwitterionic structure due to its guanidinium-like functionality and chloride counterion. Its distinct chloroacetyl substitution pattern differentiates it from ranitidine’s dimethylcarbamoylmethyl side chain. This impurity serves as a critical HPLC reference standard for quantifying process-related impurities in ranitidine active pharmaceutical ingredient batches.