Used as a key intermediate in the synthesis of fluorescent dyes and pigments, particularly in the production of rhodamine and related dye families. Its structure supports the development of compounds with strong light-emitting properties, making it valuable in manufacturing dyes for lasers, optical sensors, and biological staining. Also employed in research for developing chemiluminescent agents used in immunoassays and DNA detection due to its ability to form stable, light-emitting derivatives under mild conditions. Its reactivity allows for easy modification in organic synthesis, facilitating the creation of complex heterocyclic systems in pharmaceuticals and functional materials.