N-(Azido-PEG1)-N-bis(PEG2-t-butyl ester) is a branched PEG reagent containing an azide group with two t-butyl esters. The t-butyl group can be deprotected under acidic conditions. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage.
Usually ships within 24 hours.