3-Iodoanisole is an organic compound with the molecular formula C7H7IO. It is a colorless to pale yellow liquid at room temperature, characterized by an iodine atom and a methoxy group attached to a benzene ring in the meta position. This structure makes it a versatile aryl halide building block in organic synthesis. Its primary application is as a key intermediate in the synthesis of more complex organic molecules. It is widely used in cross-coupling reactions, such as Suzuki, Stille, and Sonogashira couplings, to introduce the 3-methoxyphenyl moiety into target structures. This makes it particularly valuable in materials science for constructing organic semiconductors, liquid crystals, and OLED (Organic Light-Emitting Diode) materials. The methoxy group can act as an electron-donating unit, influencing the electronic properties of the final material. As a halogenated aromatic compound, it requires careful handling. It should be stored away from light and moisture to prevent decomposition. Standard safety precautions for iodinated compounds, including the use of personal protective equipment and adequate ventilation, are recommended during laboratory use.