| 2804.61.00 | 00 | Silicon: | | | | |
| 2804.61.00 | 00 | Containing by weight not less than 99.99 percent of silicon | kg | Free | | 25% |
| 2804.69.10 | 00 | Containing by weight less than 99.99 percent but not less than 99 percent of silicon | kg Si kg | 5.3% | Free (A*,AU,BH, CA,CL,E,IL,J,JO, MA,MX, P,SG) | 21% |
| 2804.80.00 | 00 | Arsenic | kg | Free | | 13.2¢/kg |
| 2805 | | Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury: | | | | |
| 2805.12.00 | 00 | Calcium | kg | 3% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MA,MX, P,SG) | 25% |
| 2805.30.00 | 00 | Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed | kg | 5% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MA,MX, P,SG) | 31.3% |
| 2805.40.00 | 00 | Mercury | kg | 1.7% | Free (A*,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 5.7% |
| 2806 | | II. INORGANIC ACIDS AND INORGANIC OXYGEN COMPOUNDS OF NONMETALS | | | | |
| 2806 | | Hydrogen chloride (Hydrochloric acid); chlorosulfuric acid: | | | | |
| 2806.10.00 | 00 | Hydrogen chloride (Hydrochloric acid) | t | Free | | Free |
| 2806.20.00 | 00 | Chlorosulfuric acid | kg | 4.2% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2807.00.00 | 00 | Sulfuric acid; oleum | t | Free | | Free |
| 2808.00.00 | | Nitric acid; sulfonitric acids | | Free | | Free |
| 2808.00.00 | 10 | Nitric acid | kg | | | |
| 2808.00.00 | 20 | Sulfonitric acids | kg | | | |
| 2809 | | Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined: | | | | |
| 2809.20.00 | | Phosphoric acid and polyphosphoric acids | | Free | | Free |
| 2809.20.00 | 10 | Phosphoric acid: | | | | |
| 2809.20.00 | 10 | Containing less than 65 percent available diphosphorus pentaoxide (P2O5) equivalents | t | | | |
| 2809.20.00 | 40 | Polyphosphoric acids | t | | | |
| 2810.00.00 | 00 | Oxides of boron; boric acids | t | 1.5% | Free (A*,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 8.5% |
| 2811 | | Other inorganic acids and other inorganic oxygen compounds of nonmetals: | | | | |
| 2811.11.00 | 00 | Other inorganic acids: | | | | |
| 2811.11.00 | 00 | Hydrogen fluoride (Hydrofluoric acid) | kg | Free | | Free |
Harmonized Tariff Schedule of the United States inquiry: 3203Ã
