Chemically speaking, this molecule is "midway" amongst Sorbitan Oleate and Sorbitan Trioleate, which means that it's also an attachment of sorbitan (a dehydrated sorbitol (sugar) molecule) with the unsaturated fatty acid Oleic Acid, but in a very ratio of 2:three therefore the "Sesqui" portion within the molecule's name. When in search of clean be