From Chapter 28: Chapter 28
| HTS Code | Description | General Duty |
|---|---|---|
| 2804100000 | Hydrogen, rare gases and other nonmetals Hydrogen | 3.7% |
| 2804210000 | Rare gases Argon | 3.7% |
| 2804290000 | Rare gases Other | 3.7% |
| 2804290010 | Other Helium | 3.7% |
| 2804290020 | Other Neon | 3.7% |
| 2804290030 | Other Isotopically pure rare gases having a purity of 99 percent or more by volume | 3.7% |
| 2804290055 | Other | 3.7% |
| 2804300000 | Hydrogen, rare gases and other nonmetals Nitrogen | 3.7% |
| 2804400000 | Hydrogen, rare gases and other nonmetals Oxygen | 3.7% |
| 2804500000 | Hydrogen, rare gases and other nonmetals Boron; tellurium | Free |
| 2804500010 | Boron; tellurium Boron | Free |
| 2804500020 | Boron; tellurium Tellurium | Free |
| 2804610000 | Silicon Containing by weight not less than 99.99 percent of silicon | Free |
| 2804691000 | Other Containing by weight less than 99.99 percent but not less than 99 percent of silicon | 5.3% |
| 2804695000 | Other Other | 5.5% |
| 2804700000 | Hydrogen, rare gases and other nonmetals Phosphorus | Free |
| 2804800000 | Hydrogen, rare gases and other nonmetals Arsenic | Free |
| 2804900000 | Hydrogen, rare gases and other nonmetals Selenium | Free |