N-(Amino-PEG23)-N-bis(PEG23-Azide) is a branched PEGylation reagent containing an amino group with two azide groups. The amino group is reactive with carboxylic acids, activated NHS esters. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.