Used as a fluorescent dye in biological staining and cell membrane labeling due to its lipophilic properties, allowing it to integrate into lipid bilayers. Commonly applied in microscopy and flow cytometry for tracking cell lineage and membrane dynamics. Also utilized in material science for studying polymer morphology and phase separation because of its strong fluorescence and photostability. Serves as a tracer in environmental studies to monitor lipid-based pollutant dispersion in aqueous systems.