Used as an intermediate in the synthesis of fluorinated pharmaceuticals and agrochemicals, particularly in the development of sulfa drugs and other bioactive molecules. Its chlorosulfonyl and carboxylic acid functional groups allow for sequential derivatization, enabling the construction of complex aromatic structures. Commonly employed in the preparation of sulfonamide-based inhibitors targeting enzymes such as carbonic anhydrase. Also utilized in the manufacture of specialty polymers and dyes where fluorine substitution enhances stability and reactivity control.