N-bis(Azido-PEG10)-N-(PEG10-t-butyl ester) is a branched PEG reagent with a t-butyl group and two terminal azide groups. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The t-butyl protected carboxyl group can be deprotected under acidic conditions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.