Chapter 28
  Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
  Notes.
  1. Except where the context otherwise requires, the headings of this Chapter apply only to:
  (a) Separate chemical elements and separate chemically defined compounds, whether or not containing impurities;
  (b) The products mentioned in (a) above dissolved in water;
  (c) The products mentioned in (a) above dissolved in other solvents provided that the solution constitutes a normal and necessary method of putting up these products adopted solely for reasons of safety or for transport and that the solvent does not render the product particularly suitable for specific use rather than for general use;
  (d) The products mentioned in (a), (b) or (c) above with an added stabiliser (including an anti-caking agent) necessary for their preservation or transport;
  (e) The products mentioned in (a), (b), (c) or (d) above with an added anti- dusting agent or a colouring substance added to facilitate their identification or for safety reasons, provided that the additions do not render the product particularly suitable for specific use rather than for general use.
  2. In addition to dithionites and sulphoxylates, stabilised with organic substances (heading 28.31), carbonates and peroxocarbonates of inorganic bases (heading 28.36), cyanides, cyanide oxides and complex cyanides of inorganic bases (heading 28.37), fulminates, cyanates and thiocyanates, of inorganic bases (heading 28.42), organic products included in headings 28.43 to 28.46 and 28.52 and carbides (heading 28.49), only the following compounds of carbon are to be classified in this Chapter:
  (a) Oxit carbon, hydroxyanua và axit funminic, isoxyanic, thioxyanic và các axit xyanic đơn hoặc phức khác (nhóm 28.11);
  (a) Oxides of carbon, hydrogen cyanide and fulminic, isocyanic, thiocyanic and other simple or complex cyanogen acids (heading 28.11);
  (b) Halide oxides of carbon (heading 28.12);
  (c) Carbon disulphide (heading 28.13);
  (d) Thiocarbonates, selenocarbonates, tellurocarbonates, selenocyanates, tellurocyanates, tetrathiocyanatodiamminochromates (reineckates) and other complex cyanates, of inorganic bases (heading 28.42);
  (e) Hydrogen peroxide, solidified with urea (heading 28.47), carbon oxysulphide, thiocarbonyl halides, cyanogen, cyanogen halides and cyanamide and its metal derivatives (heading 28.53) other than calcium cyanamide, whether or not pure (Chapter 31).
  3. Subject to the provisions of Note 1 to Section VI, this Chapter does not cover:
  (a) Sodium chloride or magnesium oxide, whether or not pure, or other products of Section V;
  (b) Organo-inorganic compounds other than those mentioned in Note 2 above;
  (c) Products mentioned in Note 2, 3, 4 or 5 to Chapter 31;
  (d) Inorganic products of a kind used as luminophores, of heading 32.06; glass frit and other glass in the form of powder, granules or flakes, of heading 32.07;
  (e) Artificial graphite (heading 38.01); products put up as charges for fire- extinguishers or put up in fire-extinguishing grenades, of heading 38.13; ink removers put up in packings for retail sale, of heading 38.24; cultured crystals (other than optical elements) weighing not less than 2.5 g each, of the halides of the alkali or alkaline-earth metals, of heading 38.24;
  (f) Precious or semi-precious stones (natural, synthetic or reconstructed) or dust or powder of such stones (headings 71.02 to 71.05), or precious metals or precious metal alloys of Chapter 71;
  (g) The metals, whether or not pure, metal alloys or cermets, including sintered metal carbides (metal carbides sintered with a metal), of Section XV; or
  (h) Optical elements, for example, of the halides of the alkali or alkaline- earth metals (heading 90.01).
  4. Chemically defined complex acids consisting of a non-metal acid of sub- Chapter II and a metal acid of sub-Chapter IV are to be classified in heading 28.11.
  5. Headings 28.26 to 28.42 apply only to metal or ammonium salts or peroxysalts.
  Except where the context otherwise requires, double or complex salts are to be classified in heading 28.42.
  6. Heading 28.44 applies only to:
  (a) Technetium (atomic No. 43), promethium (atomic No. 61), polonium (atomic No. 84) and all elements with an atomic number greater than 84;
  (b) Natural or artificial radioactive isotopes (including those of the precious metals or of the base metals of Sections XIV and XV), whether or not mixed together;
  (c) Compounds, inorganic or organic, of these elements or isotopes, whether or not chemically defined, whether or not mixed together;
  (d) Alloys, dispersions (including cermets), ceramic products and mixtures containing these elements or isotopes or inorganic or organic compounds thereof and having a specific radioactivity exceeding 74 Bq/g (0.002 μCi/g);
  (e) Spent (irradiated) fuel elements (cartridges) of nuclear reactors;
  (f) Radioactive residues whether or not usable. The term “isotopes”, for the purposes of this Note and of the wording of headings 28.44 and 28.45, refers to:
  - individual nuclides, excluding, however, those existing in nature in the monoisotopic state;
  - mixtures of isotopes of one and the same element, enriched in one or several of the said isotopes, that is, elements of which the natural isotopic composition has been artificially modified.
  7. Heading 28.53 includes copper phosphide (phosphor copper) containing more than 15 % by weight of phosphorus.
  Sub-Chapter I 
  Subheading Note.
  1. For the purposes of subheading 2852.10, the expression “chemically defined” means all organic or inorganic compounds of mercury meeting the requirements of paragraphs (a) to (e) of Note 1 to Chapter 28 or paragraphs (a) to (h) of Note 1 to Chapter 29.
  Sub-Chapter I
HS code Product description in English
2801 Fluorine, chlorine, bromine and iodine.
28011000 - Chlorine
28012000 - Iodine
28013000 - Fluorine; bromine
28020000 Sulphur, sublimed or precipitated; colloidal sulphur.
2803 Carbon (carbon blacks and other forms of carbon not elsewhere specified or included).
28030020 - Acetylene black
  - Other carbon blacks:
28030041 - - Of a kind used for rubber processing
28030049 - - Other
28030090 - Other
2804 Hydrogen, rare gases and other non-metals.
28041000 - Hydrogen
  - Rare gases:
28042100 - - Argon
28042900 - - Other
28043000 - Nitrogen
28044000 - Oxygen
28045000 - Boron; tellurium
  - Silicon:
28046100 - - Containing by weight not less than 99.99 % of silicon
28046900 - - Other
28047000 - Phosphorus
28048000 - Arsenic
28049000 - Selenium
2805 Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury.
  - Alkali or alkaline-earth metals:
28051100 - - Sodium
28051200 - - Calcium
28051900 - - Other
28053000 - Rare-earth metals, scandium and yttrium whether or not intermixed or interalloyed
28054000 - Mercury
  Sub-Chapter II
  INORGANIC ACIDS AND INORGANIC OXYGEN COMPOUNDS OF NON-METALS
2806 Hydrogen chloride (hydrochloric acid); chlorosulphuric acid.
28061000 - Hydrogen chloride (hydrochloric acid)
28062000 - Chlorosulphuric acid
28070000 Sulphuric acid; oleum.
28080000 Nitric acid; sulphonitric acids.
2809 Diphosphorous pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined.
28091000 - Diphosphorus pentaoxide
280920 - Phosphoric acid and polyphosphoric acids:
  - - Food grade:
28092031 - - - Hypophosphoric acid
28092032 - - - Phosphoric acid
28092039 - - - Other
  - - Other:
28092091 - - - Hypophosphoric acid
28092092 - - - Phosphoric acid
28092099 - - - Other
28100000 Oxides of boron; boric acids.
2811 Other inorganic acids and other inorganic oxygen compounds of non-metals.
  - Other inorganic acids:
28111100 - - Hydrogen fluoride (hydrofluoric acid)
28111200 - - Hydrogen cyanide (hydrocyanic acid)
281119 - - Other:
28111910 - - - Arsenic acid
28111920 - - - Aminosulphonic acid (sulphamic acid)
28111990 - - - Other
  - Other inorganic oxygen compounds of non- metals:
28112100 - - Carbon dioxide
281122 - - Silicon dioxide:
28112210 - - - In powder form
28112290 - - - Other
281129 - - Other:
28112910 - - - Diarsenic pentaoxide
28112920 - - - Sulphur dioxide
28112990 - - - Other
  Sub-Chapter III
  HALOGEN OR SULPHUR COMPOUNDS OF NON-METAL
2812 Halides and halide oxides of non-metals.
  - Chlorides and chloride oxides:
28121100 - - Carbonyl dichloride (phosgene)
28121200 - - Phosphorus oxychloride
28121300 - - Phosphorus trichloride
28121400 - - Phosphorus pentachloride
28121500 - - Sulphur monochloride
28121600 - - Sulphur dichloride
28121700 - - Thionyl chloride
28121900 - - Other
28129000 - Other
2813 Sulphides of non-metals; commercial phosphorus trisulphide.
28131000 - Carbon disulphide
28139000 - Other
  Sub-Chapter IV
  INORGANIC BASES AND OXIDES, HYDROXIDES AND PEROXIDES OF METALS
2814 Ammonia, anhydrous or in aqueous solution.
28141000 - Anhydrous ammonia
28142000 - Ammonia in aqueous solution
2815 Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium.
  - Sodium hydroxide (caustic soda):
28151100 - - Solid
28151200 - - In aqueous solution (soda lye or liquid soda)
28152000 - Potassium hydroxide (caustic potash)
28153000 - Peroxides of sodium or potassium
2816 Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium.
28161000 - Hydroxide and peroxide of magnesium
28164000 - Oxides, hydroxides and peroxides, of strontium or barium
2817 Zinc oxide; zinc peroxide.
28170010 - Zinc oxide
28170020 - Zinc peroxide
2818 Artificial corundum, whether or not chemically defined; aluminium oxide; aluminium hydroxide.
28181000 - Artificial corundum, whether or not chemically defined
28182000 - Aluminium oxide, other than artificial corundum
28183000 - Aluminium hydroxide
2819 Chromium oxides and hydroxides.
28191000 - Chromium trioxide
28199000 - Other
2820 Manganese oxides.
28201000 - Manganese dioxide
28209000 - Other
2821 Iron oxides and hydroxides; earth colours containing 70% or more by weight of combined iron evaluated as Fe2O3.
28211000 - Iron oxides and hydroxides
28212000 - Earth colours
28220000 Cobalt oxides and hydroxides; commercial cobalt oxides.
28230000 Titanium oxides.
2824 Lead oxides; red lead and orange lead.
28241000 - Lead monoxide (litharge, massicot)
28249000 - Other
2825 Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides.
28251000 - Hydrazine and hydroxylamine and their inorganic salts
28252000 - Lithium oxide and hydroxide
28253000 - Vanadium oxides and hydroxides
28254000 - Nickel oxides and hydroxides
28255000 - Copper oxides and hydroxides
28256000 - Germanium oxides and zirconium dioxide
28257000 - Molybdenum oxides and hydroxides
28258000 - Antimony oxides
28259000 - Other
  Sub-Chapter V
  SALTS AND PEROXYSALTS OF INORGANIC ACIDS AND METALS
2826 Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts.
  - Fluorides:
28261200 - - Of aluminium
28261900 - - Other
28263000 - Sodium hexafluoroaluminate (synthetic cryolite)
28269000 - Other
2827 Chlorides, chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides.
28271000 - Ammonium chloride
282720 - Calcium chloride:
28272010 - - Containing 73 % - 80 % by weight
28272090 - - Other
  - Other chlorides:
28273100 - - Of magnesium
28273200 - - Of aluminium
28273500 - - Of nickel
282739 - - Other:
28273910 - - - Of barium or of cobalt
28273920 - - - Of iron
28273930 - - - Of zinc
28273990 - - - Other
  - Chloride oxides and chloride hydroxides:
28274100 - - Of copper
28274900 - - Other
  - Bromides and bromide oxides:
28275100 - - Bromides of sodium or of potassium
28275900 - - Other
28276000 - Iodides and iodide oxides
2828 Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites.
28281000 - Commercial calcium hypochlorite and other calcium hypochlorites
282890 - Other:
28289010 - - Sodium hypochlorite
28289090 - - Other
2829 Chlorates and perchlorates; bromates and perbromates; iodates and periodates.
  - Chlorates:
28291100 - - Of sodium
28291900 - - Other
282990 - Other:
28299010 - - Sodium perchlorate
28299090 - - Other
2830 Sulphides; polysulphides, whether or not chemically defined.
28301000 - Sodium sulphides
283090 - Other:
28309010 - - Cadmium sulphide or zinc sulphide
28309090 - - Other
2831 Dithionites and sulphoxylates.
28311000 - Of sodium
28319000 - Other
2832 Sulphites; thiosulphates.
28321000 - Sodium sulphites
28322000 - Other sulphites
28323000 - Thiosulphates
2833 Sulphates; alums; peroxosulphates (persulphates).
  - Sodium sulphates:
28331100 - - Disodium sulphate
28331900 - - Other
  - Other sulphates:
28332100 - - Of magnesium
283322 - - Of aluminium:
28332210 - - - Commercial grade
28332290 - - - Other
28332400 - - Of nickel
28332500 - - Of copper
28332700 - - Of barium
283329 - - Other:
28332920 - - - Tribasic lead sulphate
28332930 - - - Of chromium
28332990 - - - Other
28333000 - Alums
28334000 - Peroxosulphates (persulphates)
2834 Nitrites; nitrates.
28341000 - Nitrites
  - Nitrates:
28342100 - - Of potassium
283429 - - Other:
28342910 - - - Of bismuth
28342990 - - - Other
2835 Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined.
28351000 - Phosphinates (hypophosphites) and phosphonates (phosphites)
  - Phosphates:
28352200 - - Of mono- or disodium
28352400 - - Of potassium
283525 - - Calcium hydrogenorthophosphate (“dicalcium phosphate”):
28352510 - - - Feed grade
28352590 - - - Other
28352600 - - Other phosphates of calcium
283529 - - Other:
28352910 - - - Of trisodium
28352990 - - - Other
  - Polyphosphates:
28353100 - - Sodium triphosphate (sodium tripolyphosphate)
283539 - - Other:
28353910 - - - Tetrasodium pyrophosphate
28353990 - - - Other
2836 Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate.
28362000 - Disodium carbonate
28363000 - Sodium hydrogencarbonate (sodium bicarbonate)
28364000 - Potassium carbonates
283650 - Calcium carbonate:
28365010 - - Food or pharmaceutical grade
28365090 - - Other
28366000 - Barium carbonate
  - Other:
28369100 - - Lithium carbonates
28369200 - - Strontium carbonate
283699 - - Other:
28369910 - - - Commercial ammonium carbonate
28369920 - - - Lead carbonates
28369990 - - - Other
2837 Cyanides, cyanide oxides and complex cyanides.
  - Cyanides and cyanide oxides:
28371100 - - Of sodium
28371900 - - Other
28372000 - Complex cyanides
2839 Silicates; commercial alkali metal silicates.
  - Of sodium:
28391100 - - Sodium metasilicates
283919 - - Other:
28391910 - - - Sodium silicates
28391990 - - - Other
28399000 - Other
2840 Borates; peroxoborates (perborates).
  - Disodium tetraborate (refined borax):
28401100 - - Anhydrous
28401900 - - Other
28402000 - Other borates
28403000 - Peroxoborates (perborates)
2841 Salts of oxometallic or peroxometallic acids.
28413000 - Sodium dichromate
28415000 - Other chromates and dichromates; peroxochromates
  - Manganites, manganates and permanganates:
28416100 - - Potassium permanganate
28416900 - - Other
28417000 - Molybdates
28418000 - Tungstates (wolframates)
28419000 - Other
2842 Other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azides.
28421000 - Double or complex silicates, including aluminosilicates whether or not chemically defined
284290 - Other:
28429010 - - Sodium arsenite
28429020 - - Copper or chromium salts
28429030 - - Other fulminates, cyanates and thiocyanates
28429090 - - Other
  Sub-Chapter VI
  MISCELLANEOUS
2843 Colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metals.
28431000 - Colloidal precious metals
  - Silver compounds:
28432100 - - Silver nitrate
28432900 - - Other
28433000 - Gold compounds
28439000 - Other compounds; amalgams
2844 Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products.
284410 - Natural uranium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing natural uranium or natural uranium compounds:
28441010 - - Natural uranium and its compounds
28441090 - - Other
284420 - Uranium enriched in U 235 and its compounds; plutonium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing uranium enriched in U 235, plutonium or compounds of these products:
28442010 - - Uranium enriched in U 235 and its compounds; plutonium and its compounds
28442090 - - Other
284430 - Uranium depleted in U 235 and its compounds; thorium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing uranium depleted in U 235, thorium or compounds of these products:
28443010 - - Uranium depleted in U 235 and its compounds; thorium and its compounds
28443090 - - Other
284440 - Radioactive elements and isotopes and compounds other than those of subheading 2844.10, 2844.20 or 2844.30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive residues:
28444010 - - Radioactive elements and isotopes and compounds; radioactive residues
28444090 - - Other
28445000 - Spent (irradiated) fuel elements (cartridges) of nuclear reactors
2845 Isotopes other than those of heading 28.44; compounds, inorganic or organic, of such isotopes, whether or not chemically defined.
28451000 - Heavy water (deuterium oxide)
28459000 - Other
2846 Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals.
28461000 - Cerium compounds
28469000 - Other
2847 Hydrogen peroxide, whether or not solidified with urea.
28470010 - In liquid form
28470090 - Other
2849 Carbides, whether or not chemically defined.
28491000 - Of calcium
28492000 - Of silicon
28499000 - Other
28500000 Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49.
2852 Inorganic or organic compounds of mercury, whether or not chemically defined, excluding amalgams.
285210 - Chemically defined:
28521010 - - Mercury sulphates
28521020 - - Mercury compounds of a kind used as luminophores
28521090 - - Other
285290 - Other:
28529010 - - Mercury tannates
28529020 - - Mercury sulphides; mercury polysulphides; mercury polyphosphates; mercury carbides; heterocyclic mercury compounds of subheading 2934.90.90; mercury peptone derivatives; other protein derivatives of mercury
28529090 - - Other
2853 Phosphides, whether or not chemically defined, excluding ferrophosphorus; other inorganic compounds (including distilled or conductivity water and water of similar purity); liquid air (whether or not rare gases have been removed); compressed air; amalgams, other than amalgams of precious metals.
28531000 - Cyanogen chloride (chlorcyan)
285390 - Other:
28539010 - - Demineralized waters
28539090 - - Other