Used as a key reagent in organic synthesis, particularly in the preparation of sulfonate esters and sulfonamides. Its strong electron-withdrawing nature makes it valuable in promoting selective reactions, especially in the development of pharmaceuticals and agrochemicals. Commonly employed in fluorination processes and as a derivatizing agent for alcohols and amines due to its high reactivity. Also utilized in the synthesis of liquid crystals and advanced materials where thermal and chemical stability are required.