Used primarily as a highly reactive electrophilic reagent in organic synthesis, especially in SuFEx (Sulfur(VI) Fluoride Exchange) click chemistry. It serves as a key building block for constructing sulfonate and sulfonamide linkages, which are important in pharmaceuticals and functional materials. Its fluoride group enables rapid and selective coupling with nucleophiles like phenols or amines under mild conditions. The para-iodo substituent provides a versatile handle for orthogonal functionalization, such as palladium-catalyzed cross-coupling reactions (e.g., Suzuki or Sonogashira), allowing the creation of diverse sulfonyl-containing derivatives. Due to its stability and reactivity, it is widely applied in drug discovery, bioconjugation, and the development of covalent inhibitors. Also employed in the synthesis of chemical probes and polymers with well-defined architectures.