Used as a key intermediate in the synthesis of fluorescent dyes and optical brighteners due to its ability to form complex ring structures with strong light-emitting properties. Commonly employed in the production of sensors for metal ion detection, especially aluminum and zinc, because of its selective binding and fluorescence response. Also utilized in pharmaceutical research for developing bioactive molecules and heterocyclic compounds with potential antimicrobial or anticancer activity. Its rigid aromatic structure makes it suitable for constructing advanced materials such as covalent organic frameworks (COFs) used in catalysis and gas adsorption.