Used primarily as a reagent in organic synthesis, particularly in bromination reactions where selective introduction of bromine is required. It serves as a bromine source in the preparation of brominated aromatic and heterocyclic compounds, which are key intermediates in pharmaceuticals and agrochemicals. Its quinoid structure allows for reversible redox behavior, making it useful in certain catalytic cycles and electron-transfer processes. Also employed in the synthesis of natural products and bioactive molecules where controlled bromination is essential.