Chemically Talking, this molecule is "halfway" between Sorbitan Oleate and Sorbitan Trioleate, meaning that it's also an attachment of sorbitan (a dehydrated sorbitol (sugar) molecule) with the unsaturated fatty acid Oleic Acid, but in the ratio of 2:3 consequently the "Sesqui" element from the molecule's name. When Farmacy claims "makeup meltaway