Used as a fluorescent dye in laser technology, particularly in tunable dye lasers emitting in the green to yellow range. Exhibits high quantum yield and photostability, making it suitable for use in optical sensors and imaging systems. Commonly employed in fluorescence microscopy and spectroscopy due to strong emission upon excitation. Also applied in the development of chemical probes for detecting metal ions and in photodynamic therapy research owing to its light absorption and energy transfer properties.