Azido-PEG2-C1-Boc（Cat No.:I015812）is a compact heterobifunctional linker designed for efficient and controlled bioconjugation. It carries a terminal azide group for copper-catalyzed or strain-promoted click chemistry with alkynes, and a Boc-protected amine that allows orthogonal deprotection for subsequent functionalization. The short PEG2 spacer, combined with the C1 linker, provides hydrophilicity, flexibility, and minimized steric hindrance, ensuring solubility and accessibility in both aqueous and organic environments. This reagent is widely used in chemical biology, probe design, proteomics, and drug discovery, supporting modular strategies for precise and versatile molecular assembly.