This chemical is widely used in bioconjugation and labeling applications due to its unique properties. The presence of azide and Cy7 groups makes it particularly suitable for click chemistry reactions, enabling the attachment of fluorescent probes to biomolecules like proteins, peptides, or nucleic acids. The Cy7 moiety is a near-infrared dye, ideal for in vivo imaging and tracking due to its deep tissue penetration and minimal background interference. The PEG3 spacers enhance solubility and reduce steric hindrance, improving the efficiency of conjugation. It is commonly employed in research for molecular imaging, drug delivery studies, and the development of diagnostic tools. Additionally, its azide functionality allows for selective and efficient labeling of biomolecules in complex biological systems.