Used as a key intermediate in the synthesis of fluorescent dyes and optical brighteners due to its strong chromophoric properties. Its structure supports electron delocalization, making it valuable in developing sensors and probes for metal ion detection in environmental and biological systems. Also employed in the preparation of bioactive molecules and pharmaceuticals where the isochromenone core contributes to antimicrobial or anti-inflammatory activity. Suitable for research in photochemistry and material science applications involving light-emitting compounds.