1-Amino-11-azido-3,6,9-trioxaundecane

1-Amino-11-azido-3,6,9-trioxaundecane is a heterobifunctional polyethylene glycol (PEG) linker containing a primary amine and an azide group. It is primarily used in bioconjugation chemistry for attaching biomolecules to surfaces or other molecules via click chemistry or amine-reactive crosslinking.