Chemically speaking, this molecule is "midway" 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 inside a ratio of 2:three hence the "Sesqui" component during the molecule's name. We do a Best of INCIDecoder em