1-Iodo-3,5-dimethylbenzene is primarily used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals, agrochemicals, and specialty chemicals. Its structure, featuring an iodine atom and methyl groups, makes it a valuable building block for constructing more complex molecules through coupling reactions, such as Suzuki or Sonogashira couplings. It is also employed in the development of liquid crystals and advanced materials, where its aromatic and halogenated properties play a key role in tuning material properties. Additionally, it serves as a reagent in research laboratories for studying reaction mechanisms and developing new synthetic methodologies.