| 2804.10.00 | - Hydrogen | |
| 2804.21.00 | -- Argon | |
| 2804.29.00 | -- Other | |
| 2804.30.00 | - Nitrogen | |
| 2804.40.00 | - Oxygen | |
| 2804.50.00 | - Boron; tellurium | |
| 2804.61.00 | -- Containing by weight not less than 99.99% of silicon | |
| 2804.69.00 | -- Other | |
| 2804.70.00 | - Phosphorus | |
| 2804.80.00 | - Arsenic | |
| 2804.90.00 | - Selenium |