Glyceryl 1-oleate (1-O-Oleyl-rac-glycerol, Glyceryl oleate, Monoolein), is a surfactant that releases free glycerol and oleic acid upon hydrolysis. Monoolein has been used in liquid crystal studies and research shows that in the presence of monoolein, the penetration of the drug cisplatin (sc-200896) is doubled. Monoolein (1-Oleoyl-rac-glycerol) is used in the development of monoolein-based nanoparticulate liquid dispersions as possible vehicles for drug delivery. Glyceryl oleate is the monoester of glycerin and oleic acid. It's part of the hair lipids and skin lipids and has re-fating properties. Used as emulsifier and nonionic co-surfactant in various skin and hair care products. Creates water-in-oil emulsions (HLB value 3.5) but can also be used as a co-emulsifier and thickener for oil-in-water formulations. Add to oil/emulsifier phase of formulas. Typical use level: 0.5-3%. If used in surfactant systems, typical use level is 0.5-1% which should still keep shampoos clear and transparent.