Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of sulfonamide-based drugs. It serves as a building block in agrochemicals for creating herbicides and pesticides due to its bromine and amino functional groups that allow for further chemical modifications. Also employed in dye manufacturing for producing nitrogen- and sulfur-containing heterocyclic dyes. Its sulfonic acid group enhances water solubility, making it useful in aqueous reaction systems and catalysis.