Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its reactive sulfonyl chloride group enables the formation of sulfonamides, which are key structural motifs in many biologically active compounds. Commonly employed in the development of herbicides and fungicides due to the electron-withdrawing halogen substituents enhancing stability and target binding. Also utilized in medicinal chemistry for constructing potent enzyme inhibitors, especially in the design of anti-inflammatory and antimicrobial agents. Its selectivity and reactivity make it valuable in multi-step organic syntheses where controlled functionalization is required.