Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamide or sulfonate ester linkages. It is especially useful in the development of herbicides and fungicides due to the chloro and methyl substituents enhancing bioactivity. Also employed in medicinal chemistry for designing enzyme inhibitors where the sulfonyl moiety acts as a pharmacophore. Its reactivity allows for easy incorporation into more complex molecules during multi-step syntheses.