HTS Chapter 28
Inorganic chemicals; compounds of precious metals, rare-earth metals, radioactive elements or isotopes
Chapter 28 of the Harmonized Tariff Schedule of the United States has 40 four-digit headings. Choose one to see every tariff line with its general (MFN), special (free trade agreement) and Column 2 duty rate, then run a full estimate including Chapter 99 tariffs and fees.
Rates from the 2026 HTS Revision 22, effective October 30, 2026. Source: U.S. International Trade Commission.
- 2801Fluorine, chlorine, bromine and iodineGeneral: Free, 3.7%…
- 2804Hydrogen, rare gases and other nonmetalsGeneral: 3.7%, Free…
- 2805Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercuryGeneral: 5.3%, 3%…
- 2806Hydrogen chloride (Hydrochloric acid); chlorosulfuric acidGeneral: Free, 4.2%
- 2809Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically definedGeneral: Free, 1.5%
- 2811Other inorganic acids and other inorganic oxygen compounds of nonmetalsGeneral: Free, 4.2%…
- 2812Halides and halide oxides of nonmetalsGeneral: 3.7%, Free
- 2813Sulfides of nonmetals; commercial phosphorus trisulfideGeneral: 3.7%, Free
- 2814Ammonia, anhydrous or in aqueous solutionGeneral: Free
- 2815Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassiumGeneral: Free, 3.7%
- 2816Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or bariumGeneral: 3.1%, 4.2%…
- 2818Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxideGeneral: Free, 1.3%
- 2819Chromium oxides and hydroxidesGeneral: 3.7%
- 2820Manganese oxidesGeneral: 4.7%
- 2821Iron oxides and hydroxides; earth colors containing 70 percent or more by weight of combined iron evaluated as Fe2O3General: 5.5%, 3.7%…
- 2824Lead oxides; red lead and orange leadGeneral: 3%, 5.5%…
- 2825Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxidesGeneral: 3.7%, Free…
- 2826Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine saltsGeneral: Free, 3.1%…
- 2827Chlorides, chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxidesGeneral: Free, 5.5%…
- 2828Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromitesGeneral: 2.4%, 3.7%
- 2829Chlorates and perchlorates; bromates and perbromates; iodates and periodatesGeneral: Free, 3.3%…
- 2830Sulfides; polysulfides, whether or not chemically definedGeneral: 3.7%, Free…
- 2831Dithionites and sulfoxylatesGeneral: 5.5%, Free
- 2832Sulfites; thiosulfatesGeneral: 1.5%, 3.1%
- 2833Sulfates; alums; peroxosulfates (persulfates)General: Free, 3.7%…
- 2834Nitrites; nitratesGeneral: 5.5%, Free…
- 2835Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically definedGeneral: 3.1%, Free…
- 2836Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamateGeneral: Free, 3.7%…
- 2837Cyanides, cyanide oxides and complex cyanidesGeneral: Free, 1.1%…
- 2839Silicates; commercial alkali metal silicatesGeneral: 1.1%, 3.1%
- 2840Borates; peroxoborates (perborates)General: 3.7%, 0.3%…
- 2841Salts of oxometallic or peroxometallic acidsGeneral: 3.1%, 3.7%…
- 2842Other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azidesGeneral: 3.7%, 3.1%…
- 2843Colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metalsGeneral: 3.7%, 5.5%…
- 2844Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these productsGeneral: Free, 5%…
- 2845Isotopes other than those of heading 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically definedGeneral: Free
- 2846Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium, or of mixtures of these metalsGeneral: Free, 3.7%…
- 2849Carbides, whether or not chemically definedGeneral: 3.7%, 5.5%…
- 2852Inorganic or organic compounds of mercury, whether or not chemically defined, excluding amalgamsGeneral: Free, 3%
- 2853Phosphides, 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 metalsGeneral: 2.8%, 2.6%…