HS Heading/ SubheadingArticle description Base Rate Staging Category 280110000 - Chlorine 30% D 280120000 - Iodine 10% B 280130000 - Fluorine; bromine 5% A Sulphur, sublimed or precipitated; colloidal 280200000 sulphur. 5% A Carbon (carbon blacks and other forms of 280300000 carbon not elsewhere specified or included). 5% A 280410000 - Hydrogen 10% B 280421000 -- Argon 5% A 280429100 --- Neon 5% A 280429200 --- Helium 5% A 280429900 --- Other 10% B 280430000 - Nitrogen 30% D 280440000 - Oxygen : 30% D 280450000 - Boron; tellurium 10% B -- Containing by weight not less than 99.99 % of 280461000 silicon 10% B 280469000 -- Other 10% B 280470000 - Phosphorus 5% A 280480000 - Arsenic 10% B 280490000 - Selenium 5% A 280511000 -- Sodium 5% A 280519000 -- Other 5% A 280521000 -- Calcium 5% A 280522000 -- Strontium and barium 5% A - Rare-earth metals, scandium and yttrium, 280530000 whether or not intermixed or interalloyed 5% A 280540000 - Mercury 5% A 280610000 - Hydrogen chloride (hydrochloric acid) 30% D 280620000 - Chlorosulphuric acid 5% A 280700000 Sulphuric acid; oleum. 5% A 280800000 Nitric acid; sulphonitric acids. 5% A 280910000 - Diphosphorus pentaoxide 5% A 280920000 - Phosphoric acid and polyphosphoric acids 5% A 281000000 Oxides of boron; boric acids. 5% A 281111000 -- Hydrogen fluoride (hydrofluoric acid) 5% A 281119100 --- Hydrogen cyanide 5% A 281119900 --- Other 5% A 281121000 -- Carbon dioxide 30% D 281122000 -- Silicon dioxide 5% A 281123000 -- Sulphur dioxide 10% B 281129000 -- Other 5% A 281210100 -- Arsenic trichloride 5% A 281210200 -- Carbonyl dichloride (phosgene) 5% A 281210300 -- Phosphorus oxychloride 5% A 281210400 -- Phosphorus trichloride 5% A 281210500 -- Phosphorus pentachloride 5% A 281210600 -- Sulphur monochloride 5% A 281210700 -- Sulphur dichloride 5% A 281210800 -- Thionyl chloride 5% A 281210900 -- Other 5% A 281290000 - Other 5% A 281310000 - Carbon disulphide 5% A 281390000 - Other 5% A 281410000 - Anhydrous ammonia 10% B 281420000 - Ammonia in aqueous solution 10% B 281511000 -- Solid 30% D 281512000 -- In aqueous solution (soda lye or liquid soda) 30% D 281520000 - Potassium hydroxide (caustic potash) 5% A 281530000 - Peroxides of sodium or potassium 5% A 281610000 - Hydroxide and peroxide of magnesium 5% A 281620000 - Oxide, hydroxide and peroxide of strontium 5% A 281630000 - Oxide, hydroxide and peroxide of barium 5% A 281700000 Zinc oxide; zinc peroxide. 5% A - Artificial corundum, whether or not chemically 281810000 defined 5% A 281820000 - Aluminium oxide, other than artifical corundum 5% A 281830000 - Aluminium hydroxide 5% A 281910000 - Chromium trioxide 10% B 281990100 -- Chromium oxide 5% A 281990900 -- Other 10% B 282010000 - Manganese dioxide 5% A 282090000 - Other 10% B 282110000 - Iron oxides and hydroxides 5% A 282120000 - Earth colours 5% A Cobalt oxides and hydroxides; commercial 282200000 cobalt oxides. 5% A 282300000 Titanium oxides. 5% A 282410000 - Lead monoxide (litharge, massicot) 5% A 282420000 - Red lead and orange lead 5% A 282490000 - Other 5% A - Hydrazine and hydroxylamine and their 282510000 inorganic salts 5% A 282520000 - Lithium oxide and hydroxide 5% A 282530000 - Vanadium oxides and hydroxides 5% A 282540000 - Nickel oxides and hydroxides 5% A 282550000 - Copper oxides and hydroxides 5% A 282560000 - Germanium oxides and zirconium dioxide 5% A 282570000 - Molybdenum oxides and hydroxides 5% A 282580000 - Antimony oxides 5% A 282590100 -- Tin oxides 10% B 282590900 -- Other 5% A 282611000 -- Of ammonium or of sodium 5% A 282612000 -- Of aluminium 5% A 282619000 -- Other 5% A 282620000 - Fluorosilicates of sodium or of potassium 5% A - Sodium hexafluoroaluminate (synthetic 282630000 cryolite) 5% A 282690000 - Other 5% A 282710000 - Ammonium chloride 5% A 282720000 - Calcium chloride 5% A 282731000 -- Of magnesium 5% A 282732000 -- Of aluminium 5% A 282733000 -- Of iron 5% A 282734000 -- Of cobalt 5% A 282735000 -- Of nickel 5% A 282736000 -- Of zinc 5% A 282738000 -- Of barium 5% A 282739000 -- Other 5% A 282741100 --- Chloride hydroxide 10% B 282741900 --- Other 5% A 282749100 --- Chloride hydroxide 10% B 282749900 --- Other 5% A 282751000 -- Bromides of sodium or of potassium 10% B 282759000 -- Other 10% B 282760000 - Iodides and iodide oxides 10% B - Commercial calcium hypochlorite and other 282810000 calcium hypochlorites 10% B 282890000 - Other 10% B 282911000 -- Of sodium 5% A 282919000 -- Other 5% A 282990100 -- Perchlorates 5% A 282990900 -- Other 10% B 283010000 - Sodium sulphides 5% A 283020000 - Zinc sulphide 5% A 283030000 - Cadmium sulphide 5% A 283090000 - Other 5% A 283110000 - Of sodium 10% B 283190000 - Other 10% B 283210000 - Sodium sulphites 10% B 283220000 - Other sulphites 10% B 283230000 - Thiosulphates 10% B 283311000 -- Disodium sulphate 5% A 283319000 -- Other 5% A 283321000 -- Of magnesium Free E 283322000 -- Of aluminium 5% A 283323000 -- Of chromium 5% A 283324000 -- Of nickel 5% A 283325000 -- Of copper 5% A 283326000 -- Of zinc 5% A 283327000 -- Of barium 5% A 283329000 -- Other 5% A 283330000 - Alums 5% A 283340000 - Peroxosulphates (persulphates) 5% A 283410000 - Nitrites 10% B 283421000 -- Of potassium 5% A 283422000 -- Of bismuth 10% B 283429100 --- Of magnesium. 5% A 283429900 --- Other 10% B - Phosphinates (hypophosphites) and 283510000 phosphonates (phosphites) 5% A 283522000 -- Of mono-or disodium 5% A 283523000 -- Of trisodium 5% A 283524000 -- Of potassium 5% A -- Calcium hydrogenorthophosphate ( dicalcium 283525000 phosphate ) 5% A 283526000 -- Other phosphates of calcium 5% A 283529000 -- Other 5% A -- Sodium triphosphate (sodium 283531000 tripolyphosphate) 5% A 283539000 -- Other 5% A - Commercial ammonium carbonate and other 283610000 ammonium carbonates 5% A 283620000 - Disodium carbonate 5% A - Sodium hydrogencarbonate (sodium 283630000 bicarbonate) 5% A 283640000 - Potassium carbonates 5% A 283650000 - Calcium carbonate 5% A 283660000 - Barium carbonate 5% A 283670000 - Lead carbonate 5% A 283691000 -- Lithium carbonates 5% A 283692000 -- Strontium carbonate 5% A 283699000 -- Other 5% A 283711000 -- Of sodium 10% B 283719100 --- Potassium cyanide 10% B 283719900 --- Other 10% B 283720000 - Complex cyanides 10% B 283800000 Fulminates, cyanates and thiocyanates. 10% B 283911000 -- Sodium metasilicates 5% A 283919000 -- Other 5% A 283920000 - Of potassium 5% A 283990000 - Other 5% A 284011000 -- Anhydrous 5% A 284019000 -- Other 5% A 284020000 - Other borates 5% A 284030000 - Peroxoborates (perborates) 5% A 284110000 - Aluminates 10% B 284120000 - Chromates of zinc or of lead 10% B 284130000 - Sodium dichromate 10% B 284140000 - Potassium dichromate 10% B - Other chromates and dichromates; 284150000 peroxochromates 10% B 284161000 -- Potassium permanganate 10% B 284169000 -- Other 10% B 284170000 - Molybdates 5% A 284180000 - Tungstates (wolframates) 10% B 284190100 -- Salts of chrome acids 5% A 284190200 -- Potassium bicarbonates 5% A 284190900 -- Other 10% B 284210000 - Double or complex silicates 10% B 284290000 - Other 10% B 284310000 - Colloidal precious metals 10% B 284321000 -- Silver nitrate 10% B 284329000 -- Other 10% B 284330000 - Gold compounds 10% B 284390000 - Other compounds; amalgams 10% B - Natural uranium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing natural 284410000 uranium or natural uranium compounds 5% A - Uranium enriched in U235 and its compounds; plutonium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing uranium enriched in U235, plutonium or compounds of 284420000 these products 5% A - Uranium depleted in U235 and its compounds; thorium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing uranium depleted in U235, 284430000 thorium or compounds of these products 5% A - Radioactive elements and isotopes and compounds other than those of sub- heading No. 2844.10, 2844.20 or 2844.30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive 284440000 resid 5% E - Spent (irradiated) fuel elements (cartridges) of 284450000 nuclear reactors 5% A 284510000 - Heavy water (deuterium oxide) 5% A 284590000 - Other 5% A 284610000 - Cerium compounds 5% A 284690000 - Other 5% A Hydrogen peroxide, whether or not soli- dified 284700000 with urea. 5% A Phosphides, whether or not chemically defined, 284800000 excluding ferrophosphorus. 10% B 284910000 - Of calcium 5% A 284920000 - Of silicon 5% A 284990000 - Other 5% A Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 285000000 No. 28.49. 10% B 285100100 --- Cyanogen chloride 10% B 285100900 --- Other 10% B 290110000 - Saturated 5% E 290121000 -- Ethylene 5% E 290122000 -- Propene (propylene) 5% E 290123000 -- Butene (butylene) and isomers thereof 5% E 290124000 -- Buta-1,3-diene and isoprene 5% E 290129000 -- Other 5% E 290211000 -- Cyclohexane 5% E 290219000 -- Other 5% E 290220000 - Benzene 5% E 290230000 - Toluene 5% E 290241000 -- o-Xylene 5% E 290242000 -- m-Xylene 5% E 290243000 -- p-Xylene 5% E 290244000 -- Mixed xylene isomers 5% E 290250000 - Styrene 5% E 290260000 - Ethylbenzene 5% E 290270000 - Cumene 5% E 290290100 -- Pure naphthalen 5% E 290290900 -- Other 5% E -- Chloromethane (methyl chloride) and 290311000 chloroethane (ethyl chloride) 10% B 290312000 -- Dichloromethane (methylene chloride) 10% B 290313000 -- Chloroform