Used primarily as a key intermediate in the synthesis of pharmaceuticals and agrochemicals. Its reactive sulfonyl chloride group enables the formation of sulfonamides, which are common structural motifs in bioactive molecules. It is particularly valuable in the development of fluorinated compounds, where the presence of fluorine can enhance metabolic stability and binding affinity. Commonly employed in medicinal chemistry for constructing drug candidates targeting central nervous system disorders, inflammation, and infectious diseases. Also utilized in the preparation of functionalized aromatic compounds for use in materials science and as a building block in combinatorial chemistry.