Chemically Talking, this molecule is "midway" amongst Sorbitan Oleate and Sorbitan Trioleate, which means that it is also an attachment of sorbitan (a dehydrated sorbitol (sugar) molecule) with the unsaturated fatty acid Oleic Acid, but within a ratio of 2:3 therefore the "Sesqui" part during the molecule's name. When searching for clean beauty me