Used primarily as a key intermediate in the synthesis of pharmaceuticals and agrochemicals. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamides and sulfonate esters—common motifs in bioactive molecules. It is especially useful in the development of fluorinated compounds, where the presence of fluorine atoms enhances metabolic stability, lipophilicity, and binding affinity. Commonly employed in medicinal chemistry for designing enzyme inhibitors and receptor modulators. Also utilized in the preparation of specialty polymers and functional materials requiring thermal and chemical resistance.