N3-PEG-NH2 (MW 20000)

N3-PEG-NH2 (MW 20000) is a bifunctional PEG product featuring an azide group and an amino group at the PEG terminus, offering excellent water solubility, biocompatibility, and low immunogenicity. N3-PEG-NH2 (MW 20,000) is an important cross-linking agent; the azide group can be used in click chemistry, while the amine group can react with carboxylic acids or NHS esters.