Azido-PEG3-C-Boc（Cat No.:I015811）is a heterobifunctional reagent tailored for precise bioconjugation and molecular engineering. It features a terminal azide group for copper-catalyzed or strain-promoted click chemistry with alkynes, and a Boc-protected amine that can be selectively deprotected under mild conditions for further conjugation. The PEG3 spacer provides hydrophilicity, flexibility, and reduced steric hindrance, ensuring solubility and reactivity in both aqueous and organic systems. This dual-functional design makes it highly valuable in probe synthesis, drug discovery, proteomics, and biomaterials, enabling orthogonal strategies for controlled and modular molecular assembly.