| 2804.50 | | Silicon |
| 2804.61 | | Containing by weight not less than 99.99 % of silicon |
| 2811.22 | 000 | Silicon dioxide |
| 2849.20 | | Of silicon |
| 3818.00 | 010 | 1 Silicon doped for use in electronics, in the form of discs, wafers or similar forms |
| 3910.00 | | Silicones in primary forms. |
| 7201.10 | 010 | - Containing less than 1.2 % by weight of silicon and not more than 0.04 % by weight of phosphorus |
| 7201.10 | 091 | -- Containing by weight less than 1.6 % of silicon |
| 7202.19 | | Ferro-silicon |
| 7202.21 | 000 | Containing by weight more than 55 % of silicon |
| 72.25 | | Of silicon-electrical steel |
| 72.26 | | Of silicon-electrical steel |
| 8504.40 | 011 | -- Silicon rectifiers and rectifying apparatus |
| 8541.21 | 010 | - Silicon transistors |
| 8541.29 | 010 | - Silicon transistors |
