United States tariff, chapter 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
Last updated
Key facts
- National lines
- 336
- Subheadings
- 180
- Tariff
- United States
- Chapter
- 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
Summary
The United States tariff has 336 national lines in HS chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes), under 180 subheadings in 50 headings.
Subheadings with United States lines
The United States tariff has 336 national lines in HS chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes), under 180 subheadings in 50 headings.
Subheadings 1 to 100 of 180, page 1 of 2.
28.01 Fluorine, chlorine, bromine and iodine
28.02 Sulphur, sublimed or precipitated; colloidal sulphur
- 2802.00Sulphur, sublimed or precipitated; colloidal sulphur1 line
28.03 Carbon (carbon blacks and other forms of carbon not elsewhere specified or included)
- 2803.00Carbon (carbon blacks and other forms of carbon not elsewhere specified or included)2 lines
28.04 Hydrogen, rare gases and other nonmetals
- 2804.10Hydrogen1 line
- 2804.21Rare gases: Argon1 line
- 2804.29Rare gases: Other4 lines
- 2804.30Nitrogen1 line
- 2804.40Oxygen1 line
- 2804.50Boron; tellurium2 lines
- 2804.61Silicon: Containing by weight not less than 99.99 % of silicon1 line
- 2804.69Silicon: Other2 lines
- 2804.70Phosphorus1 line
- 2804.80Arsenic1 line
- 2804.90Selenium1 line
28.05 Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury
28.06 Hydrogen chloride (Hydrochloric acid); chlorosulfuric acid
28.07 Sulphuric acid; oleum
- 2807.00Sulphuric acid; oleum1 line
28.08 Nitric acid; sulphonitric acids
- 2808.00Nitric acid; sulphonitric acids2 lines
28.09 Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined
28.10 Oxides of boron; boric acids
- 2810.00Oxides of boron; boric acids1 line
28.11 Other inorganic acids and other inorganic oxygen compounds of nonmetals
- 2811.11Other inorganic acids: Hydrogen fluoride (hydrofluoric acid)1 line
- 2811.12Other inorganic acids: Hydrogen cyanide (hydrocyanic acid)1 line
- 2811.19Other inorganic acids: Other4 lines
- 2811.21Other inorganic oxygen compounds of non-metals: Carbon dioxide1 line
- 2811.22Other inorganic oxygen compounds of non-metals: Silicon dioxide2 lines
- 2811.29Other inorganic oxygen compounds of non-metals: Other4 lines
28.12 Halides and halide oxides of nonmetals
- 2812.11Chlorides and chloride oxides: Carbonyl dichloride (phosgene)1 line
- 2812.12Chlorides and chloride oxides: Phosphorus oxychloride1 line
- 2812.13Chlorides and chloride oxides: Phosphorus trichloride1 line
- 2812.14Chlorides and chloride oxides: Phosphorus pentachloride1 line
- 2812.15Chlorides and chloride oxides: Sulphur monochloride1 line
- 2812.16Chlorides and chloride oxides: Sulphur dichloride1 line
- 2812.17Chlorides and chloride oxides: Thionyl chloride1 line
- 2812.19Chlorides and chloride oxides: Other2 lines
- 2812.90Other2 lines
28.13 Sulfides of nonmetals; commercial phosphorus trisulfide
28.14 Ammonia, anhydrous or in aqueous solution
28.15 Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassium
28.16 Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium
28.17 Zinc oxide; zinc peroxide
- 2817.00Zinc oxide; zinc peroxide1 line
28.18 Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide
28.21 Iron oxides and hydroxides; earth colors containing 70 percent or more by weight of combined iron evaluated as Fe2O3
28.22 Cobalt oxides and hydroxides; commercial cobalt oxides
- 2822.00Cobalt oxides and hydroxides; commercial cobalt oxides2 lines
28.23 Titanium oxides
- 2823.00Titanium oxides1 line
28.24 Lead oxides; red lead and orange lead
28.25 Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides
- 2825.10Hydrazine and hydroxylamine and their inorganic salts1 line
- 2825.20Lithium oxide and hydroxide1 line
- 2825.30Vanadium oxides and hydroxides2 lines
- 2825.40Nickel oxides and hydroxides1 line
- 2825.50Copper oxides and hydroxides3 lines
- 2825.60Germanium oxides and zirconium dioxide3 lines
- 2825.70Molybdenum oxides and hydroxides1 line
- 2825.80Antimony oxides1 line
- 2825.90Other6 lines
28.26 Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts
28.27 Chlorides, chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides
- 2827.10Ammonium chloride1 line
- 2827.20Calcium chloride1 line
- 2827.31Other chlorides: Of magnesium1 line
- 2827.32Other chlorides: Of aluminium1 line
- 2827.35Other chlorides: Of nickel1 line
- 2827.39Other chlorides: Other10 lines
- 2827.41Chloride oxides and chloride hydroxides: Of copper1 line
- 2827.49Chloride oxides and chloride hydroxides: Other2 lines
- 2827.51Bromides and bromide oxides: Bromides of sodium or of potassium1 line
- 2827.59Bromides and bromide oxides: Other2 lines
- 2827.60Iodides and iodide oxides3 lines
28.28 Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites
28.29 Chlorates and perchlorates; bromates and perbromates; iodates and periodates
28.30 Sulfides; polysulfides, whether or not chemically defined
In other countries
No other national tariff on border.bot has live lines under chapter 28 yet.
Frequently asked questions
How many national tariff lines does the United States tariff have in HS chapter 28?
The United States tariff has 336 national lines in HS chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes), under 180 subheadings in 50 headings.
Sources and updates
The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
This page was last updated on 9 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.
Official source files: