HS Codes - 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes:

Chlorine

Fluorine; bromine:

Carbon (carbon blacks and other forms of carbon not elsewhere specified or included)

Hydrogen

Argon

Nitrogen

Boron; tellurium

Containing by weight not less than 99.99 percent of silicon

Phosphorus

Selenium

Alkali or alkaline-earth metals:

Calcium

Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed

Hydrogen chloride (Hydrochloric acid); chlorosulfuric acid:

Chlorosulfuric acid

Nitric acid; sulfonitric acids

Diphosphorus pentaoxide

Oxides of boron; boric acids

Other inorganic acids:

Hydrogen cyanide (hydrocyanic acid)

Other inorganic oxygen compounds of nonmetals:

Silicon dioxide:

Halides and halide oxides of nonmetals:

Carbonyl dichloride (phosgene)

Phosphorous trichloride

Sulfur monochloride

Thionyl chloride

Other

Carbon disulfide

Ammonia, anhydrous or in aqueous solution:

Ammonia in aqueous solution

Sodium hydroxide (Caustic soda):

In aqueous solution (Soda lye or liquid soda)

Peroxides of sodium or potassium

Hydroxide and peroxide of magnesium

Zinc oxide; zinc peroxide

Artificial corundum, whether or not chemically defined:

Aluminum hydroxide

Chromium trioxide

Manganese oxides:

Other

Iron oxides and hydroxides

Cobalt oxides and hydroxides; commercial cobalt oxides

Lead oxides; red lead and orange lead:

Other:

Hydrazine and hydroxylamine and their inorganic salts

Vanadium oxides and hydroxides

Copper oxides and hydroxides:

Molybdenum oxides and hydroxides

Other:

Fluorides:

Other:

Other:

Ammonium chloride

Other chlorides:

Of aluminum

Other:

Of copper

Bromides and bromide oxides:

Other:

Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites:

Other

Chlorates:

Other

Sulfides; polysulfides, whether or not chemically defined:

Other:

Of sodium:

Sulfites; thiosulfates:

Other sulfites

Sulfates; alums; peroxosulfates (persulfates):

Disodium sulfate:

Other sulfates:

Of aluminum

Of copper

Other:

Peroxosulfates (persulfates):

Nitrites:

Of potassium

Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined:

Phosphates:

Of potassium

Other phosphates of calcium

Polyphosphates:

Other:

Disodium carbonate

Potassium carbonates:

Barium carbonate

Lithium carbonates

Other:

Cyanides and cyanide oxides:

Other

Silicates; commercial alkali metal silicates:

Sodium metasilicates

Other:

Disodium tetraborate (refined borax):

Other

Peroxoborates (perborates)

Sodium dichromate

Manganites, manganates and permanganates:

Other

Tungstates (wolframates)

Other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azides:

Other:

Colloidal precious metals

Silver nitrate

Gold compounds

Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products:

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 these products

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:

Actinium-225, actinium-227, californium-253, curium-240, curium-241, curium-242, curium-243, curium-244, einsteinium-253, einsteinium-254, gadolinium-148, polonium-208, polonium-209, polonium-210, radium-223, uranium-230 or uranium-232, and their compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements or compounds

Radioactive residues

Isotopes other than those of heading 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically defined:

Boron enriched in boron-10 and its compounds

Helium-3

Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium, or of mixtures of these metals:

Other:

Carbides, whether or not chemically defined:

Of silicon:

Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 2849:

Chemically defined:

Phosphides, whether or not chemically defined, excluding ferrophosphorous; 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:

Other: