Each of the 4-Arm PEG-Azide has an azide group attached to a pentaerythritol core at the end of each arm. It can be used for PEGylation by click chemistry with alkynes or acetylenes. Multi-armed PEG derivatives such as 4-Arm PEG-Azide have many reactive groups that can be used to modify proteins, peptides and other materials through their functional groups. In addition, they can be used in drug delivery systems. The modified drugs have increased molecular weight and are not easily eliminated by metabolism in the body. The dispersion and solubility of the modified drugs in the body will also be improved. The multi-armed PEG derivatives can also modify the surface of biological materials or form new biomedical material.
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