Used in organic synthesis as an intermediate for pharmaceuticals and fine chemicals. Its iodine functionality allows for cross-coupling reactions, such as Suzuki or Heck reactions, enabling the construction of complex aromatic systems. Commonly employed in the development of dyes, fluorescent probes, and specialty polymers due to the naphthalene backbone’s photophysical properties. Also investigated as a building block in medicinal chemistry for designing enzyme inhibitors or receptor ligands where halogen atoms enhance binding or metabolic stability.