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. Commodity Code Description 29 23 10 Choline and its salts 29 23 20 Lecithins and other phosphoaminolipids 29 23 30 Tetraethylammonium perfluorooctane sulphonate 29 23 40 Didecyldimethylammoium perfluorooctane sulphonate 29 23 90 Other