Polyethyleneglycol (PEG), also known as polyoxyethylene (POE) or polyethylene oxide (PEO), is a polymer of fundamental commercial importance. It is a versatile synthesis polymer, obtained from the polyaddition of ethylene and water oxide or glycol, whose chemistry and properties allow a wide use in the pharmaceutical, cosmetic, biotechnological and industrial sectors. ethylene oxide chain, which is linked by an ethereal bond, is terminated by oxydrile groups. PEGilation of therapeutic molecules; hydrogenics for controlled release and tissue engineering Cosmetics sector: moisturizer, emulsifier, solubilizer, penetration enhancer and texture modifier in creams, lotions, shampoos and toothpaste Other industrial applications: wet archaeological wood consolidation, modification and functionalization of polymers, antistatic agent in textile treatments and industrial cleaning