| 290410 | 290410 - Derivatives of hydrocarbons; containing only sulpho groups, t |
| 290420 | 290420 - Derivatives of hydrocarbons; containing only nitro or only ni |
| 290431 | 290431 - Derivatives of hydrocarbons; perfluorooctane sulphonic acid, |
| 290432 | 290432 - Derivatives of hydrocarbons; ammonium perfluorooctane sulphon |
| 290433 | 290433 - Derivatives of hydrocarbons; lithium perfluorooctane sulphona |
| 290434 | 290434 - Derivatives of hydrocarbons; potassium perfluorooctane sulpho |
| 290435 | 290435 - Derivatives of hydrocarbons; salts of perfluorooctane sulphon |
| 290436 | 290436 - Derivatives of hydrocarbons; perfluorooctane sulphonyl fluori |
| 290490 | 290490 - -Other |
| 290491 | 290491 - Derivatives of hydrocarbons; trichloronitromethane (chloropic |
| 290499 | 290499 - Derivatives of hydrocarbons n.e.c. in heading no. 2904, wheth |