An amine-reactive, non-activated reagent with hydrophilic PEG4 spacer arm.
Azido-PEG4-Acid is a polyethylene glycol-containing reagent with a terminal carboxylic acid that can be reacted with primary amine groups in the presence activators (e.g. EDC, or DCC) forming a stable amide bond.
DMF, DMSO, DCM, THF, Chloroform
Colourless to slightly yellow oil