Used primarily in the synthesis of luminescent compounds, especially as an intermediate in the preparation of acridone-based dyes and fluorescent markers. It plays a key role in the production of chemiluminescent agents used in immunoassays and nucleic acid probes, where it contributes to signal generation in diagnostic testing. Its structure allows for easy functionalization, making it valuable in developing bioconjugates for research and clinical diagnostics. Also employed in the development of photoactive polymers and organic semiconductors due to its aromatic and electron-accepting properties.