2923 Quaternary Ammonium Salts and Hydroxides, Lecithins and Other Phosphoaminolipids, Whether or not Chemically Defined

2923 (01/1988-..) Quaternary Ammonium Salts and Hydroxides, Lecithins and Other Phosphoaminolipids, Whether or not Chemically Defined 29231000 (01/1998-..) Choline and its Salts 29231010 (01/1988-12/1997) Choline Chloride 29231090 (01/1988-12/1997) Choline and its Salts (Excl. Choline Chloride) 29232000 (01/1988-..) Lecithins and Other Phosphoaminolipids, Whether or not Chemically Defined 29233000 (01/2017-..) Tetraethylammonium Perfluorooctane Sulphonate 29234000 (01/2017-..) Didecyldimethylammonium Perfluorooctane Sulphonate 29239000 (01/2017-..) Quaternary Ammonium Salts and Hydroxides (Excl. Choline and its Salts, Tetraethylammonium Perfluorooctane Sulphonate and Didecyldimethylammonium Perfluorooctane Sulphonate)