Widely used as a fluorescent tracer in environmental studies, particularly to track water flow and detect leaks in complex piping systems. Its strong fluorescence allows for easy detection even at very low concentrations. Commonly applied in hydrology to study groundwater movement and surface water interactions. Used in biological staining to visualize cell structures under fluorescence microscopy. Applied in the development and testing of dye lasers due to its efficient light emission properties. Also utilized in education and demonstrations to illustrate fluid dynamics and mixing processes.