| 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% |
| 2811.22 | | Silicon dioxide: | | | | |
| 2849.20 | | Of silicon: | | | | |
| 2931.00.90 | 10 | Organo-silicon compounds | kg | | | |
| 2933.99.65 | 00 | Anticonvulsants, hypnotics and sedatives | kg | 6.5% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,K,MA,MX, P,SG) | 15.4￠/kg + 48.5% |
| 3004.40.00 | 20 | Anticonvulsants, hypnotics, and sedatives | kg | | | |
| 3004.90.91 | 30 | Anticonvulsants, hypnotics and sedatives | kg | | | |
| 3910.00.00 | 00 | Silicones in primary forms | kg | 3% | Free (A,AU,BH, CA,CL,E,IL,J,JO, K,MA,MX, P,SG) | 25% |
| 7017.10.30 | 00 | Quartz reactor tubes and holders designed for insertion into diffusion and oxidation furnaces for production of semiconductor wafers | X | Free | | 50% |
| 7020.00.30 | 00 | Quartz reactor tubes and holders designed for insertion into diffusion and oxidation furnaces for production of semiconductor wafers | X | Free | | 55% |
| 7202.21 | | Ferrosilicon: | | | | |
| 7202.21 | | Containing by weight more than 55 percent of silicon: | | | | |
| 7202.21.10 | 00 | Containing by weight more than 55 percent but not more than 80 percent of silicon: | | | | |
| 7202.21.75 | 00 | Containing by weight more than 80 percent but not more than 90 percent of silicon | kg Si kg | 1.9% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MX,P,SG) 1.2% (MA) | 9% |
| 7202.21.90 | 00 | Containing by weight more than 90 percent of silicon | kg Si kg | 5.8% | Free (A+,AU,BH, CA,CL,D,E,IL, J,JO,MX, P,SG) 3.8% (MA) | 40% |
| 7202.30.00 | 00 | Ferrosilicon manganese | kg Mn kg | 3.9% | Free (A*,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 23% |
| 7202.50.00 | 00 | Ferrosilicon chromium | kg Cr kg | 10% | Free (A,CA,CL, E,IL,J,JO,MA, MX,P) 5% (AU) 3.7% (SG) | 25% |
| 7202.80.00 | 00 | Ferrotungsten and ferrosilicon tungsten | kg W kg | 5.6% | Free (A,AU,BH,CA, CL,E,IL,J,JO,MA, MX,P, SG) | 35% |
| 7202.91.00 | 00 | Ferrotitanium and ferrosilicon titanium | kg | 3.7% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MX,P,SG) 2.4% (MA) | 25% |
| 7202.93.40 | 00 | Containing by weight less than 0.02 percent of phosphorus or sulfur or less than 0.4 percent of silicon | kg | 5% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MX,P,SG) 3.3% (MA) | 25% |
| 7202.99.20 | 00 | Calcium silicon | kg | 5% | Free (A,AU,BH,CA, CL,D,E,IL,J, JO,MX,P,SG) 3.3% (MA) | 25% |
| 7225.11.00 | 00 | Of silicon electrical steel: | | | | |
| 7226.11 | | Of silicon electrical steel: | | | | |
