Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 23 Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined. 29 23 40 Didecyldimethylammoium perfluorooctane sulphonate Commodity Code Description 29 23 40 00 Didecyldimethylammoium perfluorooctane sulphonate