Sulfo-Cy7 cadaverine is widely used in biomedical research for labeling biomolecules due to its near-infrared fluorescence properties. It is particularly effective in imaging and tracking applications, as its emission wavelength allows for deep tissue penetration with minimal background interference. This makes it suitable for in vivo studies, such as monitoring tumor progression, tracking cell migration, and visualizing vascular structures. Additionally, it is commonly conjugated to antibodies, peptides, or proteins for targeted imaging, enabling precise detection of specific biological targets. Its water solubility further enhances its utility in biological systems, reducing the need for organic solvents. Overall, it is a valuable tool in fluorescence microscopy, flow cytometry, and other diagnostic techniques.