1-Chloro-2-iodobenzene is primarily used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. Its unique structure, containing both chlorine and iodine atoms, makes it a valuable building block for constructing complex molecules. It is often employed in cross-coupling reactions, such as the Suzuki or Heck reactions, to form carbon-carbon bonds, which are essential in drug development. Additionally, it serves as a precursor in the synthesis of dyes, pigments, and other specialty chemicals. Its reactivity and versatility make it a key component in research and industrial applications focused on creating advanced materials and bioactive compounds.