| 2804.30 | 000 | Nitrogen |
| 2811.29 | | 1 Dinitrogen tetroxide and Sulphur dioxide |
| 2811.29 | 110 | - Dinitrogen tetroxide |
| 2920.90 | | IX.- NITROGEN-FUNCTION COMPOUNDS |
| 29.29 | | Compounds with other nitrogen function. |
| 29.33 | | Heterocyclic compounds with nitrogen hetero-atom(s) only. |
| 31.02 | | Mineral or chemical fertilisers, nitrogenous. |
| 31.05 | | Mineral or chemical fertilisers containing two or three of the fertilising elements nitrogen, phosphorus and potassium; other fertilisers; goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg. |
| 3105.20 | 000 | Mineral or chemical fertilisers containing the three fertilising elements nitrogen, phosphorus and potassium |
| 3105.40 | | Other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus : |