VITIPURE P 188 MG product is an alpha hydrogen - hydroxy poly (ethylene oxide) a-poly (propylene oxide) b-poly (ethylene oxide) a block copolymer. Reaction of epichlorohydrin and propylene glycol to form polyoxypropylene glycol, followed by addition of ethylene oxide to form block copolymers. In the copolymer, the ethylene oxide units (a) are 75-85, the propylene oxide units (b) are 25-30, the ethylene oxide (EO) content is 79.9% -83.7%, and the average molecular weight is 7680-9510.