Used as an intermediate in organic synthesis, particularly in the preparation of sulfonamide derivatives which have applications in pharmaceuticals and agrochemicals. Its reactivity allows for the introduction of sulfonyl chloride functional groups into complex molecules, facilitating the development of bioactive compounds. Commonly employed in the synthesis of herbicides and fungicides due to the stability and electron-withdrawing nature of the sulfonyl chloride moiety. Also utilized in research settings for modifying aromatic systems in drug discovery programs.