polo188Poloxamer 188 solid; CAS Number: 9003-11-6; Synonyms: Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol),Lutrol F68 at Sma-AldrichStructure of Poloxamer 188, with two hydrophilic ends and a hydrophobic core in the middle. Currently, available literature depicts that P188 has a half-life of 18 hours after injection in