| 2923.10 | 000 | Choline and its salts |
| 2923.20 | 000 | Lecithins and other phosphoaminolipids |
| 2923.30 | 000 | Tetraethylammonium perfluorooctane sulphonate |
| 2923.40 | 000 | Didecyldimethylammonium perfluorooctane sulphonate |
| 2923.90 | | Other |
| 2923.90 | 100 | 1 1-Adamantyl trimethylammonium hydroxide (ADAH) and tetraethylammonium hydroxide (TEAH) |
| 2923.90 | 900 | 2 Other |
