Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined:
| Subheading | Description | General | Special | Other |
|---|---|---|---|---|
| 2923.10 | Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined | — | — | — |
| 2923.20 | Lecithins and other phosphoaminolipids: | — | — | — |
| 2923.30 | Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined | — | — | — |
| 2923.40 | Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined | — | — | — |
| 2923.90 | Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined | — | — | — |