Used primarily as a building block in organic synthesis, especially in cross-coupling reactions such as Suzuki, Stille, and Heck reactions. Its dual halogen functionality allows selective activation, where the iodine moiety typically reacts first due to its higher reactivity, enabling stepwise construction of complex aromatic systems. Commonly employed in the development of polycyclic aromatic compounds, pharmaceuticals, and materials for organic electronics such as OLEDs and semiconducting polymers. Also utilized in the synthesis of ligands and functionalized naphthalene derivatives for research in medicinal and materials chemistry.