| 28112100 | Acid, carbonic, Carbon dioxide, Ice, dry |
| 28112200 | Hydrated silica, not powdered, Silica gel, Silica gel, pure, Silica powder, chemically prepared, Silica powder, pure, Silica, chemically prepared, not in powder form, Silicic anhydride (silicon dioxide), Silicon dioxide |
| 28112900 | Arsenic oxide, Arsenic pentoxide, Diarsenic pentaoxide |
| 28121000 | Acid, dichlorosulphonic, Arsenic chlorides, Arsenic trichloride, Boron trichloride, Carbon oxychloride, Carbonyl chloride, Carbonyl dichloride, Chloride oxide, Chlorides, Chlorine trifluoride, Iodine chloride, Iodine trichloride, Nitrogen oxychloride, Nit |
| 28129000 | Arsenic iodide, Arsenic triiodide, Boron tribromide, Boron trifluoride, Bromine trifluoride, Carbonyl fluoride, Iodine bromide, Iodine pentafluoride, Nitrogen trifluoride, Phosphorus bromides, Phosphorus fluorides, Phosphorus iodide, Phosphorus tri-iodide |
| 28131000 | Carbon disulphide |
| 28139000 | Arsenic disulphide, Arsenic monosulphide, Arsenic sulphides, excluding natural arsenic sulphides, Arsenic trisulphide, Commerical phosphorus trisulphide, Diarsenic disulphide, Diarsenic pentasulphide, Diarsenic trisulphide, Diphosphorus pentasulphide, Dis |
| 28141000 | Ammonia, anhydrous |
| 28142000 | Ammonia water, Ammonia, in aqueous solution |
| 28151100 | Caustic soda flakes, Caustic soda, solid, Sodium hydroxide, solid |
