| 2804.50 | 000 | Boron; tellurium | 
| 2804.61 | 100 | 1 Of single crystal | 
| 2804.61 | 200 | 2 Other | 
| 2804.69 | 000 | Other | 
| 2804.70 | 000 | Phosphorus | 
| 2804.80 | 000 | Arsenic | 
| 28.05 |  | Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury | 
| 28.05 |  | Alkali or alkaline-earth metals | 
| 2805.19 | 000 | Other | 
| 2805.30 | 000 | Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed | 
| 2805.40 | 000 | Mercury | 
| 2805.40 |  | II.- INORGANIC ACIDS AND INORGANIC OXYGEN COMPOUNDS OF NON-METALS | 
| 28.06 |  | Hydrogen chloride (hydrochloric acid); chlorosulphuric acid | 
| 2806.10 | 000 | Hydrogen chloride (hydrochloric acid) | 
| 2806.20 | 000 | Chlorosulphuric acid | 
| 2807.00 | 000 | Sulphuric acid; oleum | 
| 2808.00 | 000 | Nitric acid; sulphonitric acids | 
| 28.09 |  | Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined | 
| 2809.10 | 000 | Diphosphorus pentaoxide | 
| 2809.20 | 000 | Phosphoric acid and polyphosphoric acids | 
| 2810.00 | 000 | Oxides of boron; boric acids | 
| 28.11 |  | Other inorganic acids and other inorganic oxygen compounds of non-metals | 
| 28.11 |  | Other inorganic acids |