Used primarily as an intermediate in the synthesis of agrochemicals and pharmaceuticals. Its reactive sulfonyl chloride group enables the formation of sulfonamides, which are key structural motifs in several bioactive molecules. Commonly employed in the development of herbicides and fungicides due to the electron-withdrawing chlorine and methyl group enhancing stability and target specificity. Also utilized in the preparation of dyes and functional polymers where sulfonyl chloride derivatives contribute to cross-linking or color fastness. Its selective reactivity makes it valuable in multi-step organic syntheses requiring controlled functionalization.