Used in bioconjugation and chemical synthesis, this compound serves as a versatile linker for attaching biomolecules, such as proteins, peptides, or antibodies, to other entities like dyes, drugs, or solid supports. Its azide group enables click chemistry reactions, particularly with alkynes, facilitating efficient and selective coupling. The PEG3 spacer enhances solubility and reduces steric hindrance, while the C6 chain provides flexibility. The terminal chlorine allows for further functionalization or substitution, making it valuable in drug delivery systems, diagnostic tools, and material science applications.