Acid-PEG4-mono-methyl ester CAS:2028284-75-3 is a PEG species with terminal carboxylic acid and mono-methyl ester moieties. The carboxylic acid can be reacted with primary amines in the presence of activators such as EDC and DCC to form stable amide bonds. The hydrophilic PEG linker can increase the compound’s water solubility in aqueous environments.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.