Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its reactive sulfonyl chloride group allows for easy attachment to amines or alcohols, forming sulfonamides or sulfonate esters, which are key structural motifs in bioactive molecules. Commonly employed in the development of herbicides and fungicides due to the compound’s ability to enhance lipophilicity and stability in final active ingredients. Also utilized in medicinal chemistry for constructing sulfonamide-based drug candidates with potential antimicrobial or anti-inflammatory activity.