Chemically speaking, this molecule is "midway" in between Sorbitan Oleate and Sorbitan Trioleate, indicating that it's also an attachment of sorbitan (a dehydrated sorbitol (sugar) molecule) with the unsaturated fatty acid Oleic Acid, but in a ratio of 2:3 therefore the "Sesqui" part from the molecule's identify. In addition to having a good basic