Used primarily as a key intermediate in organic synthesis, especially in the preparation of radiolabeled compounds for medical imaging. Its iodoethynyl group allows for easy incorporation of radioactive iodine isotopes, making it valuable in the development of radiopharmaceuticals for positron emission tomography (PET) scans. The compound’s aromatic and alkyne functionalities also support use in click chemistry and palladium-catalyzed coupling reactions, enabling the construction of complex molecules in drug discovery and materials science.