Specification of PEG 4000
Selling polyethylene glycol (PEG) polymer is hydrophilic. This can be easily synthesized by ring opening polymerization of ethylene oxide anionic, to various molecular weights and various groups of late. When the cross to the PEG can have a high water content, forming "hidrogel PEG is the material suitable for biological applications because it does not trigger an immune response.
