Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceuticals and agrochemicals. Its sulfonyl chloride functional group allows for easy attachment to amines or alcohols, forming sulfonamides or sulfonate esters, which are common motifs in drug design. It is also employed in the preparation of cyclic sulfones that serve as building blocks in medicinal chemistry due to their metabolic stability and conformational rigidity. Additionally, it finds use in materials science for modifying polymer properties through sulfonation reactions.