Used primarily as a versatile alkylating agent in organic synthesis, particularly in pharmaceutical and agrochemical research. Its reactive bromomethyl group readily undergoes nucleophilic substitution, enabling the introduction of the 4-(methylsulfonyl)benzyl moiety into target molecules. This functionality is valuable in the development of bioactive compounds, including enzyme inhibitors and receptor ligands. The electron-withdrawing methylsulfonyl group enhances the electrophilicity of the bromomethyl site, improving reaction efficiency. Commonly employed in the preparation of intermediates for drug candidates, especially in projects requiring sulfonyl-containing aromatic systems with tailored reactivity.