↑ International Union of Pure and Applied Chemistry. "ketones" Compendium of Chemical Terminology Internet edition.
↑ The position of the carbonyl group is usually denoted by a number; in propanone there can only be one position. While propanone or propan-2-one is how the molecule should be named according to systematic nomenclature, the name "acetone" is retained in official IUPAC nomenclature
