Azido-PEG1-Boc is widely used in bioconjugation and chemical synthesis due to its dual functionality. The azide group allows for click chemistry reactions, particularly copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it valuable for labeling biomolecules like proteins, peptides, and nucleic acids. The Boc (tert-butoxycarbonyl) group serves as a protective group for amines, enabling selective deprotection in multi-step synthetic processes. This compound is particularly useful in drug development, polymer chemistry, and material science, where precise modification and functionalization of molecules are required. Its PEG (polyethylene glycol) spacer enhances solubility and reduces steric hindrance, improving reaction efficiency in aqueous and organic environments.