Used as a fluorescent probe in biological imaging due to its strong near-infrared emission, allowing deep tissue visualization with minimal background interference. Its lipophilic nature enables easy penetration of cell membranes, making it suitable for live-cell imaging and tracking of cellular processes. Commonly applied in confocal microscopy and flow cytometry for detecting membrane dynamics and organelle structures. Also utilized in photodynamic therapy research as a photosensitizer due to its ability to generate reactive oxygen species upon light excitation.