Used as a fluorescent dye in laser technology, particularly in tunable dye lasers operating in the red to near-infrared range. Exhibits high quantum yield and photostability, making it suitable for spectroscopic applications and optical research. Also employed in the development of organic light-emitting diodes (OLEDs) and nonlinear optical materials due to its strong intramolecular charge transfer properties. Finds use in bioimaging and sensing applications where red emission is advantageous for deeper tissue penetration.