4arm-PEG-Thiol, MW 20K is a thiol-functional multi-arm PEG polymer synthesized by ethoxylation of pentaerythritol, the number of ethylene oxide units in the PEG chain may not be equal for all arms. It can be applied in bioconjugation, drug delivery, PEG hydrogels, cross-linking agents and surface functionalization.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.
