Ethyl 3-iodo-4-methoxybenzoate is primarily utilized in organic synthesis as a versatile intermediate for constructing complex molecules. Its iodine atom makes it a valuable substrate in cross-coupling reactions, such as Suzuki or Sonogashira couplings, enabling the formation of carbon-carbon bonds. The methoxy group enhances the compound's reactivity and directs further functionalization, making it useful in the synthesis of pharmaceuticals, agrochemicals, and advanced materials. Additionally, it serves as a precursor in the development of bioactive compounds, particularly in medicinal chemistry, where its structure can be modified to create potential drug candidates. Its ester group also allows for further derivatization, expanding its applications in fine chemical production.