Used primarily as an intermediate in the synthesis of biologically active compounds, particularly in pharmaceuticals and agrochemicals. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamide and sulfonate ester derivatives. It plays a key role in the development of kinase inhibitors and other targeted therapies in medicinal chemistry. The pyrazole moiety contributes to binding selectivity in drug-receptor interactions, enhancing its utility in designing potent and specific agents. Also employed in the preparation of functionalized aromatic compounds for materials science research.