Used in bioconjugation for fluorescent labeling of biomolecules such as antibodies, peptides, and proteins. Its near-infrared emission allows deep tissue imaging with low autofluorescence, making it suitable for in vivo imaging and non-invasive tracking in biological systems. Commonly applied in fluorescence microscopy, flow cytometry, and molecular imaging for cancer research and drug delivery studies. Stable under physiological conditions and compatible with various bioconjugation protocols.