Used as a fluorescent dye in laser dyes, particularly in dye lasers operating in the near-infrared region. It serves as a spectral sensitizer in photographic emulsions and is employed in fluorescence microscopy for cell imaging due to its strong emission properties. Also utilized in environmental tracing studies to monitor water flow and detect leaks in geological formations. Its high quantum yield makes it suitable for use in optical sensors and photovoltaic devices as a light-harvesting component.