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28 - inorganic chemicals; organic or inorganic compounds of precious metals, of rare earth metals, of radioactive elements or of isotopes
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28.01 - halogens - fluorine, chlorine, bromine and iodine:
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28.02 - sulfur -
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28.03 - carbon -
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28.04 - hydrogen - hydrogen, rare gases and other nonmetals:
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28.05 - alkaline metals - alkali or alkalineearth metals; rareearth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury:
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28.06 - hydrochloric acid - ii. inorganic acids and inorganic oxygen compounds of nonmetals
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28.07 - sulfuric acid -
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28.08 - nitric acids -
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28.09 - phosphoric acid - diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined:
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28.10 - boron -
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28.11 - other inorganic acids - other inorganic acids and other inorganic oxygen compounds of nonmetals:
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28.12 - halides - iii. halogen or sulfur compounds of nonmetals
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28.13 - nonmetal sulfides - sulfides of nonmetals; commercial phosphorus trisulfide:
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28.14 - ammonia - ammonia, anhydrous or in aqueous solution:
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28.15 - sodium or potassium peroxides - sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium:
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28.16 - magnesium hydroxide and peroxide - hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium:
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28.17 - zinc oxide and peroxide -
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28.18 - aluminium oxide - artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide:
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28.19 - chromium oxides and hydroxides - chromium oxides and hydroxides:
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28.20 - manganese oxides - manganese oxides:
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28.21 - iron oxides and hydroxides - iron oxides and hydroxides; earth colors containing 70 percent or more by weight of combined iron evaluated as fe2o3:
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28.22 - cobalt oxides and hydroxides -
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28.23 - titanium oxides -
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28.24 - lead oxides - lead oxides; red lead and orange lead:
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28.25 - inorganic salts - hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides:
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28.26 - fluorides - v. salts and peroxysalts, of inorganic acids and metals
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28.27 - chlorides - chlorides, chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides:
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28.28 - hypochlorites - hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites:
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28.29 - chlorates and perchlorates - chlorates and perchlorates; bromates and perbromates; iodates and periodates:
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28.30 - sulfides - sulfides; polysulfides, whether or not chemically defined:
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28.31 - dithionites and sulfoxylates - dithionites and sulfoxylates:
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28.32 - sulfites - sulfites; thiosulfates:
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28.33 - sulfates - sulfates; alums; peroxosulfates (persulfates):
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28.34 - nitrites and nitrates - nitrites; nitrates:
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28.35 - phosphinates and phosphonates - phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined:
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28.36 - carbonates - carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate:
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28.37 - cyanides - cyanides, cyanide oxides and complex cyanides:
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28.39 - silicates - silicates; commercial alkali metal silicates:
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28.40 - borates - borates; peroxoborates (perborates):
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28.41 - oxometallic or peroxometallic acid salts - salts of oxometallic or peroxometallic acids:
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28.42 - other inorganic acids salts - other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azides:
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28.43 - precious metal compounds - colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metals:
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28.44 - radioactive chemicals - radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products:
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28.45 - other isotopes - isotopes other than those of heading 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically defined:
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28.46 - rare-earth metal compounds - compounds, inorganic or organic, of rareearth metals, of yttrium or of scandium, or of mixtures of these metals:
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28.47 - hydrogen peroxide -
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28.48 - phosphides -
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28.49 - carbides - carbides, whether or not chemically defined:
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28.50 - hydrides and other anions -
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28.52 - mercury compounds - 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
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28.53 - other inorganic compounds -
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