Cy5 cadaverine is widely used in fluorescence labeling and imaging applications due to its strong near-infrared fluorescence properties. It is often employed in biological research to label proteins, peptides, and other biomolecules, enabling their visualization and tracking in complex cellular environments. Its application is particularly valuable in live-cell imaging, where its stability and brightness allow for real-time monitoring of dynamic processes. Additionally, it is utilized in molecular biology techniques such as fluorescence in situ hybridization (FISH) and immunohistochemistry to detect specific targets with high sensitivity. The compound is also used in drug delivery studies to trace the distribution and uptake of therapeutic agents in tissues. Its versatility and effectiveness make it a key tool in advancing research in biochemistry, cell biology, and medical diagnostics.