4-Arm PEG-Epoxide (4-Arm PEG-EPO), MW 20K is a multi-armed PEG derivative with epoxy or epoxy groups at each end of the four arms attached to a pentaerythritol core . Epoxides also polymerize when initiated with alcohol molecules in the presence of a catalyst, forming polyethers with pendant hydroxyl groups.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.