Used in bioconjugation and chemical biology, this compound serves as a linker for attaching molecules to proteins, peptides, or other biomolecules. Its azido group enables click chemistry reactions, particularly with alkynes, facilitating efficient and selective coupling. The PEG spacer enhances solubility and reduces steric hindrance, making it suitable for applications in drug delivery, antibody-drug conjugates, and labeling studies. It is also employed in the development of bioprobes and imaging agents for research in cellular and molecular biology.