Widely used as a fluorescent tracer in environmental studies 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 laboratory settings to visualize fluid dynamics and mixing processes. Employed in biological staining to label cells or tissues under fluorescence microscopy. Also utilized in the development and calibration of fluorescence-based sensors and instruments. Occasionally used in education to demonstrate dye dispersion in fluids. Not suitable for food or cosmetic use due to toxicity concerns.