Widely used as a fluorescent tracer in biological and environmental studies due to its strong emission under UV or blue light. Commonly applied in fluorescence microscopy to label cells and cellular components, enabling visualization of structures and processes. Employed in flow visualization in fluid dynamics research, helping to track movement and mixing in liquids. Also used as a laser dye in tunable dye lasers, particularly in the green-to-red emission range. Its high quantum yield and photostability make it suitable for sensing applications, including detection of ions and pH changes in solution.