| 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% |
| 2809.20.00 | 10 | Containing less than 65 percent available diphosphorus pentaoxide (P2O5) equivalents | t | | | |
| 2815 | | Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassium: | | | | |
| 2815.20.00 | | Potassium hydroxide (Caustic potash) | | Free | | 2.2¢/kg |
| 2815.30.00 | 00 | Peroxides of sodium or potassium | kg | 3.7% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2824.10.00 | 00 | Lead monoxide (litharge, massicot) | kg | 3% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 12% |
| 2826.90.10 | 00 | Fluorosilicates of sodium or of potassium | kg | 4.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 62.5% |
| 2827.51.00 | 00 | Bromides of sodium or of potassium | kg | Free | | 22¢/kg |
| 2827.60.20 | 00 | Of potassium | kg | 2.8% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 7.5% |
| 2829.90.05 | 00 | Potassium bromate | kg | Free | | 25% |
| 2829.90.40 | 00 | Of potassium | kg | 3.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2834.21.00 | 00 | Of potassium | t | Free | | Free |
| 2835.24.00 | 00 | Of potassium | kg | 3.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2835.39.10 | 00 | Of potassium | kg | 3.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2836.40 | | Potassium carbonates: | | | | |
| 2836.40.10 | 00 | Dipotassium carbonate | kg | 1.9% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 6% |
| 2836.40.20 | 00 | Potassium hydrogencarbonate (Potassium bicarbonate) | kg | 1.3% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 4.8% |
| 2837.19.01 | 10 | Potassium cyanide | kg | | | |
| 2837.20.10 | 00 | Potassium ferricyanide | kg | 1.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 5.1% |
| 2839.90.10 | 00 | Of potassium | kg | 3.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2841.50.10 | 00 | Potassium dichromate | kg | 1.5% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 3.5% |
| 2841.61.00 | 00 | Potassium permanganate | kg | 5% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX, P,SG) | 23% |
| 2841.90.30 | 00 | Potassium stannate | kg | 3.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2844 | | Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products: | | | | |
Harmonized Tariff Schedule of the United States inquiry: 39ÃÂÃÂÃÂÃÂÃÂÃÂÃÂãÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂ=
