US HTS chapter 28

Short title: Inorganic chemicals; compounds of precious metals, of rare-earth metals, of radioactive elements.

A short title is written by HTS Pilot; it is not the text of the schedule.

50 headings

The title of this chapter and its legal notes are not reproduced here. Chapter 28 at USITC, with its title and notes (PDF)

Heading	Description	Lines
2801	Fluorine, chlorine, bromine and iodine	5
2802	Sulfur, sublimed or precipitated; colloidal sulfur	1
2803	Carbon (carbon blacks and other forms of carbon not elsewhere specified or included)	3
2804	Hydrogen, rare gases and other nonmetals	19
2805	Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury	16
2806	Hydrogen chloride (Hydrochloric acid); chlorosulfuric acid	2
2807	Sulfuric acid; oleum	1
2808	Nitric acid; sulfonitric acids	3
2809	Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined	6
2810	Oxides of boron; boric acids	1
2811	Other inorganic acids and other inorganic oxygen compounds of nonmetals	17
2812	Halides and halide oxides of nonmetals	13
2813	Sulfides of nonmetals; commercial phosphorus trisulfide	5
2814	Ammonia, anhydrous or in aqueous solution	2
2815	Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassium	6
2816	Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium	4
2817	Zinc oxide; zinc peroxide	1
2818	Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide	7
2819	Chromium oxides and hydroxides	2
2820	Manganese oxides	2
2821	Iron oxides and hydroxides; earth colors containing 70 percent or more by weight of combined iron evaluated as Fe2O3	7
2822	Cobalt oxides and hydroxides; commercial cobalt oxides	3
2823	Titanium oxides	1
2824	Lead oxides; red lead and orange lead	5
2825	Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides	23
2826	Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts	11
2827	Chlorides, chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides	29
2828	Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites	2
2829	Chlorates and perchlorates; bromates and perbromates; iodates and periodates	7
2830	Sulfides; polysulfides, whether or not chemically defined	6
2831	Dithionites and sulfoxylates	4
2832	Sulfites; thiosulfates	5
2833	Sulfates; alums; peroxosulfates (persulfates)	27
2834	Nitrites; nitrates	9
2835	Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined	14
2836	Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate	19
2837	Cyanides, cyanide oxides and complex cyanides	8
2839	Silicates; commercial alkali metal silicates	5
2840	Borates; peroxoborates (perborates)	6
2841	Salts of oxometallic or peroxometallic acids	22
2842	Other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azides	6
2843	Colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metals	5
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	30
2845	Isotopes other than those of heading 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically defined	5
2846	Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium, or of mixtures of these metals	15
2847	Hydrogen peroxide, whether or not solidified with urea	1
2849	Carbides, whether or not chemically defined	9
2850	Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 2849	6
2852	Inorganic or organic compounds of mercury, whether or not chemically defined, excluding amalgams	6
2853	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	7

All chapters

Source: USITC, Harmonized Tariff Schedule of the United States – 2026 HTS Revision 20, effective 28 September 2026. The schedule at USITC

Not shown: the additional duties of Chapter 99 (such as Section 301 and Section 232), anti-dumping and countervailing duties, quotas and the legal notes.

This page is general information, not legal advice and not a classification decision. Tariff texts and rates change: check the publisher's current schedule, and ask the customs authority for a binding ruling where the answer matters.