Used as a near-infrared fluorescent dye in biological imaging and staining. Exhibits strong absorption and emission in the NIR region, allowing deep tissue imaging with minimal background autofluorescence. Commonly applied in cell membrane labeling due to its lipophilic nature, enabling integration into lipid bilayers. Also utilized in fluorescence microscopy and flow cytometry for tracking cell processes and membrane dynamics. Stable and photostable under physiological conditions, making it suitable for long-term imaging experiments.