All HS code sections
Section VI · Chemical Products · Chapter 28
Inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes
Headings 2801–285350 headings180 six-digit codes
About chapter 28
Chapter 28 covers inorganic chemicals; organic and inorganic compounds of precious metals, rare earth metals, radioactive elements and isotopes: acids, oxides, salts and elemental chemicals used as industrial feedstocks. It sits alongside chapter 29 (organic chemicals) as one of the two large chemical-industry chapters.
Classification tip: Many chapter 28 compounds are also dual-use precursor chemicals monitored under international non-proliferation and narcotics-precursor regimes, so check for export-control flags before shipping, not just the customs tariff.
180 six-digit codes
2801
Fluorine, chlorine, bromine and iodine
3 codes2801.10Chlorine2801.20Iodine2801.30Fluorine; bromine
2802
Sulphur; sublimed or precipitated, colloidal sulphur
1 code2802.00Sulphur; sublimed or precipitated, colloidal sulphur
2803
Carbon; carbon blacks and other forms of carbon n.e.c.
1 code2803.00Carbon; carbon blacks and other forms of carbon n.e.c.
2804
Hydrogen, rare gases and other non-metals
11 codes2804.10Hydrogen2804.21Gases, rare; argon2804.29Gases, rare; other than argon2804.30Nitrogen2804.40Oxygen2804.50Boron; tellurium2804.61Silicon; containing by weight not less than 99.99% of silicon2804.69Silicon; containing by weight less than 99.99% of silicon2804.70Phosphorus2804.80Arsenic2804.90Selenium
2805
Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury
5 codes2805.11Alkali or alkali-earth metals; sodium2805.12Alkali or alkali-earth metals; calcium2805.19Alkali or alkali-earth metals; other than sodium and calcium2805.30Earth-metals, rare; scandium and yttrium, whether or not intermixed or interalloyed2805.40Mercury
2806
Hydrogen chloride (hydrochloric acid); chlorosulphuric acid
2 codes2806.10Hydrogen chloride (hydrochloric acid)2806.20Chlorosulphuric acid
2807
Sulphuric acid; oleum
1 code2807.00Sulphuric acid; oleum
2808
Nitric acid; sulphonitric acids
1 code2808.00Nitric acid; sulphonitric acids
2809
Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined
2 codes2809.10Diphosphorus pentoxide2809.20Phosphoric acid and polyphosphoric acids
2810
Oxides of boron; boric acids
1 code2810.00Oxides of boron; boric acids
2811
Inorganic acids and other inorganic oxygen compounds of non-metals; n.e.c. in heading no. 2806 to 2810
6 codes2811.11Hydrogen fluoride (hydrofluoric acid)2811.12Hydrogen cyanide (hydrocyanic acid)2811.19Inorganic acids; other than hydrogen fluoride2811.21Carbon dioxide2811.22Silicon dioxide2811.29Inorganic oxygen compounds; of non-metals, n.e.c. in item no. 2811.2
2812
Halides and halide oxides of non-metals
9 codes2812.11Carbonyl dichloride (phosgene)2812.12Phosphorus oxychloride2812.13Phosphorus trichloride2812.14Phosphorus pentachloride2812.15Sulphur monochloride2812.16Sulphur dichloride2812.17Thionyl chloride2812.19Arsenic trichloride and other chlorides and chloride oxides, n.e.c. in item no. 28122812.90Halides and halide oxides of non-metals; excluding chloride
2813
Sulphides of non-metals; commercial phosphorus trisulphide
2 codes2813.10Carbon disulphide2813.90Sulphides of non-metals, (excluding carbon); commercial phosphorus trisulphide
2814
Ammonia; anhydrous or in aqueous solution
2 codes2814.10Ammonia; anhydrous2814.20Ammonia; in aqueous solution
2815
Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash) peroxides of sodium or potassium
4 codes2815.11Sodium hydroxide (caustic soda); solid2815.12Sodium hydroxide (caustic soda); in aqueous solution (soda lye or liquid soda)2815.20Potassium hydroxide (caustic potash)2815.30Peroxides of sodium or potassium
2816
Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides of strontium or barium
2 codes2816.10Hydroxide and peroxide of magnesium2816.40Oxides, hydroxides and peroxides, of strontium or barium
2817
Zinc; oxide and peroxide
1 code2817.00Zinc; oxide and peroxide
2818
Aluminium oxide (including artificial corundum); aluminium hydroxide
3 codes2818.10Aluminium oxide; artificial corundum2818.20Aluminium oxide; other than artificial corundum2818.30Aluminium hydroxide
2819
Chromium oxides and hydroxides
2 codes2819.10Chromium trioxide2819.90Chromium oxides and hydroxides; excluding chromium trioxide
2820
Manganese oxides
2 codes2820.10Manganese dioxide2820.90Manganese oxides; excluding manganese dioxide
2821
Iron oxides and hydroxides; earth colours containing 70% or more by weight of combined iron evaluated as Fe2o3
2 codes2821.10Iron oxides and hydroxides2821.20Earth colours; containing 70% or more by weight of combined iron evaluated as Fe2o3
2822
Cobalt oxides and hydroxides; commercial cobalt oxides
1 code2822.00Cobalt oxides and hydroxides; commercial cobalt oxides
2823
Titanium oxides
1 code2823.00Titanium oxides
2824
Lead oxides; red lead and orange lead
2 codes2824.10Lead; lead monoxide (litharge, massicot)2824.90Lead oxides; n.e.c. in heading no. 2824
2825
Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides
9 codes2825.10Hydrazine and hydroxylamine and their inorganic salts2825.20Lithium oxide and hydroxide2825.30Vanadium oxides and hydroxides2825.40Nickel oxides and hydroxides2825.50Copper oxides and hydroxides2825.60Germanium oxides and zirconium dioxide2825.70Molybdenum oxides and hydroxides2825.80Antimony oxides2825.90Inorganic bases, metal oxides, hydroxides and peroxides; n.e.c. in heading no. 2825
2826
Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts
4 codes2826.12Fluorides; of aluminium2826.19Fluorides; other than of aluminium2826.30Sodium hexafluoroaluminate (synthetic cryolite)2826.90Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts, n.e.c. in heading no. 2826
2827
Chlorides; chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides
11 codes2827.10Chlorides; of ammonium2827.20Chlorides; of calcium2827.31Chlorides; of magnesium2827.32Chlorides; of aluminium2827.35Chlorides; of nickel2827.39Chlorides; other than of ammonium, calcium, magnesium, aluminium and nickel2827.41Chloride oxides and chloride hydroxides; of copper2827.49Chloride oxides and chloride hydroxides; other than of copper2827.51Bromides; of sodium or of potassium2827.59Bromides and bromide oxides; other than item no. 2827.512827.60Iodides and iodide oxides
2828
Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites
2 codes2828.10Hypochlorites; commercial calcium hypochlorite and other calcium hypochlorites2828.90Hypochlorites; n.e.c. in heading no. 2828
2829
Chlorates and perchlorates; bromates and perbromates; iodates and periodates
3 codes2829.11Chlorates; of sodium2829.19Chlorates; other than sodium2829.90Perchlorates; bromates and perbromates; iodates and periodates
2830
Sulphides; polysulphides whether or not chemically defined
2 codes2830.10Sulphides; of sodium, whether or not chemically defined2830.90Sulphides and polysulphides; whether or not chemically defined, other than sulphides of sodium
2831
Dithionites and sulphoxylates
2 codes2831.10Dithionites and sulphoxylates; of sodium2831.90Dithionites and sulphoxylates; other than sodium
2832
Sulphites; thiosulphates
3 codes2832.10Sulphites; of sodium2832.20Sulphites; other than of sodium2832.30Thiosulphates
2833
Sulphates; alums; peroxosulphates (persulphates)
10 codes2833.11Sodium sulphates; disodium sulphate2833.19Sodium sulphates; other than disodium sulphate2833.21Sulphates; of magnesium2833.22Sulphates; of aluminium2833.24Sulphates; of nickel2833.25Sulphates; of copper2833.27Sulphates; of barium2833.29Sulphates; n.e.c. in item no. 2833.22833.30Alums2833.40Peroxosulphates (persulphates)
2834
Nitrites; nitrates
3 codes2834.10Nitrites2834.21Nitrates; of potassium2834.29Nitrates; of other than potassium
2835
Phosphinates (hypophosphites), phosphonates (phosphites), and phosphates; and polyphosphates, whether or not chemically defined
8 codes2835.10Phosphinates (hypophosphites) and phosphonates (phosphites), whether or not chemically defined2835.22Phosphates; of mono- or disodium, whether or not chemically defined2835.24Phosphates; of potassium, whether or not chemically defined2835.25Phosphates; calcium hydrogenorthophosphate (dicalcium phosphate), whether or not chemically defined2835.26Phosphates; of calcium n.e.c. in item no. 2835.25, whether or not chemically defined2835.29Phosphates; (other than of mono- or disodium, other than of potassium or of calcium hydrogenorthophosphate (dicalcium phosphate) and excluding other phosphates of calcium), whether or not chemically defined2835.31Polyphosphates; sodium triphosphate (sodium tripolyphosphate), whether or not chemically defined2835.39Polyphosphates; other than sodium triphosphate (sodium tripolyphosphate), whether or not chemically defined
2836
Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate
8 codes2836.20Carbonates; disodium carbonate2836.30Carbonates; sodium hydrogen carbonate (sodium bicarbonate)2836.40Carbonates; potassium carbonate2836.50Carbonates; calcium carbonate2836.60Carbonates; barium carbonate2836.91Carbonates; lithium carbonate2836.92Carbonates; strontium carbonate2836.99Carbonates; n.e.c. in heading no. 2836 and other than lithium or strontium
2837
Cyanides, cyanide oxides and complex cyanides
3 codes2837.11Cyanides and cyanide oxides; of sodium2837.19Cyanides and cyanide oxides; other than of sodium2837.20Complex cyanides
2839
Silicates; commercial alkali metal silicates
3 codes2839.11Silicates; sodium metasilicates2839.19Silicates; of sodium (excluding sodium metasilicates)2839.90Silicates; commercial alkali metal silicates, other than of sodium
2840
Borates; peroxoborates (perborates)
4 codes2840.11Borates; disodium tetraborate (refined borax), anhydrous2840.19Borates; disodium tetraborate (refined borax), other than anhydrous2840.20Borates; n.e.c. in heading no. 28402840.30Peroxoborates (perborates)
2841
Salts of oxometallic or peroxometallic acids
7 codes2841.30Salts; sodium dichromate2841.50Salts; chromates, dichromates, peroxochromates; n.e.c. in heading no. 28412841.61Salts; of oxometallic or peroxometallic acids, manganites, manganates and permanganates, potassium permanganate2841.69Salts; of oxometallic or peroxometallic acids, manganites, manganates and permanganates, other than potassium permanganate2841.70Salts; molybdates2841.80Salts; tungstates (wolframates)2841.90Salts of oxometallic or peroxometallic acids; n.e.c. in heading no. 2841
2842
Salts of inorganic acids or peroxoacids, n.e.c. including aluminosilicates whether or not chemically defined, but excluding azides
2 codes2842.10Salts of inorganic acids or peroxoacids, double or complex silicates, including aluminosilicates, whether or not chemically defined, excluding azides2842.90Salts; of inorganic acids or peroxoacids, other than double or complex silicates, including aluminosilicates, whether or not chemically, excluding azides
2843
Colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metals
5 codes2843.10Colloidal precious metals; whether or not chemically defined2843.21Silver compounds; silver nitrates2843.29Silver compounds; excluding silver nitrates2843.30Gold compounds2843.90Inorganic or organic compounds of precious metals, n.e.c.; 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
8 codes2844.10Uranium; natural uranium and its compounds, alloys, dispersions (including cermets), ceramic products and mixtures containing natural uranium or natural uranium compounds2844.20Uranium; enriched in U235, plutonium, their compounds, alloys dispersions (including cermets), ceramic products and mixtures containing uranium enriched in U235, plutonium or compounds of these products2844.30Uranium; depleted in U235, thorium, their compounds, alloys, dispersions (including cermets), ceramic products and mixtures containing uranium depleted in U235, thorium; compounds of these products2844.41Radioactive elements; tritium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing tritium or its compounds2844.42Radioactive elements; actinium-225, 227, californium-253, curium-240, 241, 242, 243, 244, einsteinium-253, 254, gadolinium-148, polonium-208, 209, 210, radium-223, uranium-230 or 232, compounds; alloys, dispersions, ceramic products and mixtures2844.43Radioactive elements, isotopes and compounds; other alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds2844.44Radioactive elements, isotopes, compounds n.e.c. in heading no. 2844, alloys, dispersions (including cermets), ceramic products, mixtures containing the elements, isotopes, compounds; radioactive residues2844.50Spent (irradiated) fuel elements (cartridges) of nuclear reactors
2845
Isotopes other than those of heading no. 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically defined
5 codes2845.10Heavy water (deuterium oxide)2845.20Boron enriched in boron-10 and its compounds2845.30Lithium enriched in lithium-6 and its compounds2845.40Helium-32845.90Isotopes other than those of heading no. 2844, 2845.20, 2845.30 or 2845.40; compounds, inorganic or organic, of such isotopes, whether or not chemically defined
2846
Compounds, inorganic or organic, of rare-earth metals; of yttrium or of scandium or of mixtures of these metals
2 codes2846.10Cerium compounds2846.90Compounds, inorganic or organic (excluding cerium), of rare-earth metals, of yttrium, scandium or of mixtures of these metals
2847
Hydrogen peroxide; whether or not solidified with urea
1 code2847.00Hydrogen peroxide; whether or not solidified with urea
2849
Carbides, whether or not chemically defined
3 codes2849.10Carbides; of calcium, whether or not chemically defined2849.20Carbides; of silicon, whether or not chemically defined2849.90Carbides; whether or not chemically defined, other than of calcium or silicon
2850
Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading no. 2849
1 code2850.00Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading no. 2849
2852
Inorganic or organic compounds of mercury, excluding amalgams, whether or not chemically defined
2 codes2852.10Inorganic or organic compounds of mercury, excluding amalgams, chemically defined2852.90Inorganic or organic compounds of mercury; excluding amalgams, not chemically defined,
2853
Phosphides, chemically defined or not, not ferrophosphorus; other inorganic compounds n.e.c. (including distilled, conductivity water and water of like purity); liquid air, rare gases removed or not; compressed air; amalgams, not precious metal amalgams
2 codes2853.10Inorganic compounds; cyanogen chloride (chlorcyan)2853.90Phosphides, chemically defined or not, not ferrophosphorus; other inorganic compounds n.e.c. (including distilled, conductivity water and water of like purity); liquid air, rare gases removed or not; compressed air; amalgams, not precious metal amalgams
More chapters in section VI: Chemical Products
Codes and descriptions follow the WCO six-digit Harmonized System nomenclature. National tariff schedules extend these to 8–13 digits and set the actual duty rate, so confirm the full code for your destination country with your customs broker before filing. To copy a code, hover a row and use the copy button; every code has 2801-style dot notation ready for your commercial invoice.
Chapter 28 FAQ
What does HS code chapter 28 cover?
Chapter 28 of the Harmonized System covers: inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes. It belongs to section VI (Chemical Products) and contains 50 four-digit headings, 2801–2853.
How many HS codes are in chapter 28?
Chapter 28 contains 50 four-digit headings and 180 six-digit subheadings. Countries subdivide these further (8–13 digits) in their national tariff schedules, so the full national count is larger.
Is HS code 2801 the same in every country?
Yes. The six-digit level of every code in this chapter is harmonised by the World Customs Organization and identical in all member countries. Digits beyond the sixth (for example the US 10-digit HTS or the EU 8-digit CN) are national and set the actual duty rate.
How do I choose the right code within chapter 28?
Work from the four-digit heading down: pick the heading that best matches your product, then the six-digit subheading that matches its material, form or processing. If two codes seem to fit, customs rules (the General Rules of Interpretation) decide, and when in doubt, confirm with your customs broker before filing.