Used as a key reagent in organic synthesis, particularly in the preparation of sulfonamides and sulfonate esters, which are important in pharmaceuticals and agrochemicals. It serves as a sulfonylating agent due to the high reactivity of the sulfonyl fluoride group. Commonly employed in the synthesis of herbicides and dyes. Also utilized in chemical biology for protein labeling and inhibitor development, taking advantage of its selective reactivity with nucleophilic amino acids like serine and lysine. Stable under a variety of conditions, making it suitable for multi-step synthetic routes.