Used as an intermediate in the synthesis of biologically active compounds, particularly in the development of pharmaceuticals. Its sulfonyl chloride functional group allows it to act as an electrophilic agent, enabling the introduction of sulfonate esters or sulfonamides into target molecules. Commonly employed in medicinal chemistry for modifying molecular frameworks to enhance pharmacokinetic properties or to serve as a key step in building complex ring systems. Also utilized in agrochemical research for designing novel active ingredients with improved stability and efficacy.