PEG21 is a polymer consisting of ethylene glycol monomers and two terminal hydroxyl groups. The PEG chain can increase the water solubility of a compound in aqueous media. Increasing the number of ethylene glycol units within the entire chain improves the solubility properties of the PEG linker.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.