Used as an intermediate in organic synthesis, particularly in the production of dyes, pharmaceuticals, and agrochemicals. Its sulfonic acid group enhances water solubility, making it useful in the formulation of water-soluble compounds. It also serves as a building block in the preparation of sulfonamide derivatives, which are important in medicinal chemistry for developing antibacterial and antidiabetic agents. Additionally, it can act as a catalyst or reagent in electrophilic aromatic substitution reactions due to the electron-withdrawing nature of both the bromo and sulfonic acid groups.