Used primarily as a key intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. It serves as a building block for constructing complex molecules due to its reactive sulfonyl chloride group, which facilitates the formation of sulfonamides, sulfonate esters, and other derivatives. Its bromo and fluoro substituents enhance its utility in cross-coupling reactions, enabling the introduction of aromatic rings into target compounds. Additionally, it is employed in the development of biologically active compounds, including potential drug candidates, where the sulfonyl group plays a critical role in modulating activity and bioavailability.