2-Bromo-1-chloro-4-iodobenzene is a polyhalogenated organic reagent primarily used in the field of organic synthesis. Its molecular structure is characterised by the presence of reactive bromine, chlorine and iodine functional groups on the benzene ring, which provides controllable multi-site coupling conditions for this compound. 2-Bromo-1-chloro-4-iodobenzene can be used to construct the molecular frameworks of active pharmaceutical ingredients (APIs) and to prepare organic optoelectronic materials (such as OLED emitting materials and solar cell materials).