This chemical is widely used in biomedical research and diagnostics due to its unique properties. It is commonly employed in fluorescence imaging and labeling applications, where the Cy5 component provides strong fluorescence in the near-infrared range, making it ideal for in vivo and in vitro imaging. The PEG chains enhance solubility and reduce non-specific binding, improving the stability and efficiency of the molecule in biological systems. It is often utilized in antibody labeling, protein conjugation, and cellular imaging studies, enabling researchers to track and visualize biological processes with high specificity and sensitivity. Additionally, its PEGylated structure makes it suitable for drug delivery systems, where it can be used to modify therapeutic agents for improved pharmacokinetics and targeted delivery.