| 2522.30.00 | 00 | Hydraulic lime | kg | Free | | 0.2¡é/kg, including weight of container |
| 2523 | | Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers: | | | | |
| 2523.90.00 | 00 | Other hydraulic cements | t | Free | | $1.32/t, including weight of container |
| 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: | | | | |
| 2811.22.10 | 00 | Synthetic silica gel | kg | 3.7% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2826 | | Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts: | | | | |
| 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% |
| 2839 | | Silicates; commercial alkali metal silicates: | | | | |
| 2839.11.00 | 00 | Sodium metasilicates | kg | 1.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 3% |
| 2841 | | Salts of oxometallic or peroxometallic acids: | | | | |
| 2842 | | Other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azides: | | | | |
| 2842.10.00 | 00 | Double or complex silicates, including alumino- silicates whether or not chemically defined | kg | 3.7% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,K,MA,MX, P,SG) | 25% |
| 2849.20 | | Of silicon: | | | | |
| 2850.00 | | Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 2849: | | | | |
| 2901 | | Acyclic hydrocarbons: | | | | |
| 2902 | | Cyclic hydrocarbons: | | | | |
| 2903.11.00 | | Saturated chlorinated derivatives of acyclic hydrocarbons: | | | | |
| 2903.21.00 | 00 | Unsaturated chlorinated derivatives of acyclic hydrocarbons: | | | | |
| 2903.31.00 | 00 | Fluorinated, brominated or iodinated derivatives of acyclic hydrocarbons: | | | | |
| 2903.41.00 | 00 | Halogenated derivatives of acyclic hydrocarbons containing two or more different halogens: | | | | |
| 2905 | | Acyclic alcohols and their halogenated, sulfonated, nitrated or nitrosated derivatives: | | | | |
| 2905.22 | | Acyclic terpene alcohols: | | | | |
