Used primarily as an intermediate in the synthesis of sulfa drugs and other fluorinated pharmaceutical compounds. Its reactive chlorosulfonyl group allows for easy attachment to amines, forming sulfonamide linkages common in antimicrobial agents. Also employed in the preparation of agrochemicals and dyes where fluorinated aromatic structures enhance stability and bioactivity. Commonly used in research settings to introduce fluorinated benzoic acid moieties into larger molecules for drug discovery and development.