| 2810.00 | 000 | Oxides of boron; boric acids | 
| 28.11 |  | Other inorganic acids and other inorganic oxygen compounds of non-metals | 
| 2811.11 | 000 | Hydrogen fluoride (hydrofluoric acid) | 
| 2811.19 |  | Other inorganic oxygen compounds of non-metals : | 
| 2811.29 |  | III.- HALOGEN OR SULPHUR COMPOUNDS OF NON-METALS | 
| 28.12 |  | Halides and halide oxides of non-metals | 
| 28.13 |  | Sulphides of non-metals; commercial phosphorus trisulphide | 
| 2813.90 |  | IV.- INORGANIC BASES AND OXIDES, HYDROXIDES AND PEROXIDES OF METALS | 
| 28.15 |  | Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium | 
| 2815.30 | 000 | Peroxides of sodium or potassium | 
| 28.16 |  | Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium | 
| 2816.10 | 000 | Hydroxide and peroxide of magnesium | 
| 2816.40 | 000 | Oxides, hydroxides and peroxides, of strontium or barium | 
| 28.21 |  | Iron oxides and hydroxides; earth colours containing 70 % or more by weight of combined iron evaluated as Fe2O3 | 
| 2825.90 |  | V.- SALTS AND PEROXYSALTS, OF INORGANIC ACIDS AND METALS | 
| 2826.12 | 000 | Of aluminium | 
| 2826.19 | 010 | - Of ammonium or of sodium | 
| 2826.90 | 100 | 1 Fluorosilicates of sodium or of potassium | 
| 2827.31 | 000 | Of magnesium | 
| 2827.32 | 000 | Of aluminium | 
| 2827.35 | 000 | Of nickel | 
| 2827.39 | 100 | 1 Of zinc | 
| 2827.39 | 910 | - Of iron |