Used primarily as an intermediate in the synthesis of heterocyclic compounds, particularly in the preparation of brominated indoles and other nitrogen-containing ring systems. It plays a key role in pharmaceutical and agrochemical research where bromine-substituted aromatic frameworks are needed for further functionalization. The hydrazine group allows for cyclization reactions, making it valuable in the development of dyes, bioactive molecules, and specialty organic compounds. Its reactivity supports use in coupling reactions and the construction of complex molecules in medicinal chemistry.