| 25.11 | | Natural barium sulphate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 28.16 |
| 25.22 | | Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 28.25 |
| 28.01 | | Fluorine, chlorine, bromine and iodine |
| 2801.10 | 000 | Chlorine |
| 2801.20 | 000 | Iodine |
| 2801.30 | 000 | Fluorine; bromine |
| 28.02 | | |
| 2802.00 | 000 | Sulphur, sublimed or precipitated; colloidal sulphur |
| 28.03 | | |
| 2803.00 | 000 | Carbon (carbon blacks and other forms of carbon not elsewhere specified or included) |
| 28.04 | | Hydrogen, rare gases and other non-metals |
| 2804.10 | 000 | Hydrogen |
| 2804.10 | | Rare gases |
| 2804.21 | 000 | Argon |
| 2804.29 | | Other |
| 2804.29 | 100 | - Helium |
| 2804.29 | 200 | - Other |
| 2804.30 | 000 | Nitrogen |
| 2804.40 | 000 | Oxygen |
| 2804.50 | 000 | Boron; tellurium |
| 2804.50 | | Silicon |
| 2804.61 | | Containing by weight not less than 99.99 % of silicon |
| 2804.61 | 100 | 1 Of single crystal |
