Used as a key intermediate in the synthesis of fluorescent dyes and sensors due to its xanthone core, which exhibits strong photoluminescent properties. Commonly applied in the development of pH sensors and metal ion detectors, especially for detecting aluminum, zinc, and iron in environmental and biological samples. Its hydroxyl groups allow easy functionalization, making it suitable for creating chemosensors with high selectivity and sensitivity. Also employed in the preparation of photoactive materials for optoelectronic devices and in some pharmaceutical research for its potential antioxidant and enzyme inhibitory activities.