4-Methanesulfonylbenzylamine hydrochloride is primarily used in pharmaceutical research and development as a key intermediate in the synthesis of various biologically active compounds. Its structure makes it valuable in the creation of molecules that target specific enzymes or receptors, particularly in the development of drugs for neurological and inflammatory conditions. The compound’s sulfonyl group enhances its ability to interact with biological targets, making it useful in designing inhibitors or modulators for therapeutic applications. Additionally, it is employed in organic synthesis to introduce the methanesulfonylbenzylamine moiety into more complex chemical structures, aiding in the exploration of new drug candidates.