| 28.13 |  | Sulphides of non-metals; commercial phosphorus trisulphide | 
| 2813.10 | 000 | Carbon disulphide | 
| 2813.90 | 000 | Other | 
| 2813.90 |  | IV.- INORGANIC BASES AND OXIDES, HYDROXIDES AND PEROXIDES OF METALS | 
| 28.14 |  | Ammonia, anhydrous or in aqueous solution | 
| 2814.10 | 000 | Anhydrous ammonia | 
| 28.15 |  | Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium | 
| 28.15 |  | Sodium hydroxide (caustic soda) : | 
| 2815.12 | 000 | In aqueous solution (soda lye or liquid soda) | 
| 2815.20 | 000 | Potassium hydroxide (caustic potash) | 
| 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 | 
| 2817.00 | 000 | Zinc oxide; zinc peroxide | 
| 28.18 |  | Artificial corundum, whether or not chemically defined; aluminium oxide; aluminium hydroxide | 
| 2818.10 |  | Artificial corundum, whether or not chemically defined | 
| 2818.10 | 010 | - Sized grains | 
| 2818.10 | 090 | - Other | 
| 2818.20 | 000 | Aluminium oxide, other than artificial corundum | 
| 2818.30 | 000 | Aluminium hydroxide | 
| 28.19 |  | Chromium oxides and hydroxides | 
| 2819.10 | 000 | Chromium trioxide |