Used primarily as a key intermediate in the synthesis of photochromic materials, especially in the production of ophthalmic lenses that darken upon exposure to UV light. Its rigid, conjugated structure supports efficient energy transfer and stability in reversible photochemical reactions. It is also employed in the development of organic semiconductors and molecular switches due to its electron-accepting properties and thermal stability. Additionally, it finds use in research settings for designing supramolecular systems and sensors where amide-linked aromatic frameworks enhance binding and signal transduction.