Used as a blue fluorescent dye in dye lasers, Coumarin 445 is valued for its high fluorescence efficiency and photostability. It serves in spectroscopic studies and as a laser gain medium in tunable lasers, particularly in research settings requiring precise blue-to-green wavelength output. It is also applied in fluorescence microscopy and optical sensors due to its strong emission and solubility in common organic solvents. Its performance in solid-state dye matrices makes it suitable for use in organic light-emitting diodes (OLEDs) and other photonic devices.