# United States tariff, chapter 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes (page 1 of 2)

> The United States tariff has 336 national lines in HS chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of… Page 1 of 2.

Source: https://border.bot/countries/united-states/hs-codes/28
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 28](https://border.bot/countries/united-states/hs-codes/28)

Page 1 of 2: subheadings 1 to 100 of 180. Next page: [page 2](https://border.bot/countries/united-states/hs-codes/28?page=2).

## Key facts

- National lines: 336
- Subheadings: 180
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes

## 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.

### 28.01 Fluorine, chlorine, bromine and iodine

- [2801.10](https://border.bot/countries/united-states/hs-codes/280110) Chlorine (1 line)
- [2801.20](https://border.bot/countries/united-states/hs-codes/280120) Iodine (1 line)
- [2801.30](https://border.bot/countries/united-states/hs-codes/280130) Fluorine; bromine (2 lines)

### 28.02 Sulphur, sublimed or precipitated; colloidal sulphur

- [2802.00](https://border.bot/countries/united-states/hs-codes/280200) Sulphur, sublimed or precipitated; colloidal sulphur (1 line)

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

- [2803.00](https://border.bot/countries/united-states/hs-codes/280300) Carbon (carbon blacks and other forms of carbon not elsewhere specified or included) (2 lines)

### 28.04 Hydrogen, rare gases and other nonmetals

- [2804.10](https://border.bot/countries/united-states/hs-codes/280410) Hydrogen (1 line)
- [2804.21](https://border.bot/countries/united-states/hs-codes/280421) Rare gases: Argon (1 line)
- [2804.29](https://border.bot/countries/united-states/hs-codes/280429) Rare gases: Other (4 lines)
- [2804.30](https://border.bot/countries/united-states/hs-codes/280430) Nitrogen (1 line)
- [2804.40](https://border.bot/countries/united-states/hs-codes/280440) Oxygen (1 line)
- [2804.50](https://border.bot/countries/united-states/hs-codes/280450) Boron; tellurium (2 lines)
- [2804.61](https://border.bot/countries/united-states/hs-codes/280461) Silicon: Containing by weight not less than 99.99 % of silicon (1 line)
- [2804.69](https://border.bot/countries/united-states/hs-codes/280469) Silicon: Other (2 lines)
- [2804.70](https://border.bot/countries/united-states/hs-codes/280470) Phosphorus (1 line)
- [2804.80](https://border.bot/countries/united-states/hs-codes/280480) Arsenic (1 line)
- [2804.90](https://border.bot/countries/united-states/hs-codes/280490) Selenium (1 line)

### 28.05 Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury

- [2805.11](https://border.bot/countries/united-states/hs-codes/280511) Alkali or alkaline-earth metals: Sodium (1 line)
- [2805.12](https://border.bot/countries/united-states/hs-codes/280512) Alkali or alkaline-earth metals: Calcium (1 line)
- [2805.19](https://border.bot/countries/united-states/hs-codes/280519) Alkali or alkaline-earth metals: Other (4 lines)
- [2805.30](https://border.bot/countries/united-states/hs-codes/280530) Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed (6 lines)
- [2805.40](https://border.bot/countries/united-states/hs-codes/280540) Mercury (1 line)

### 28.06 Hydrogen chloride (Hydrochloric acid); chlorosulfuric acid

- [2806.10](https://border.bot/countries/united-states/hs-codes/280610) Hydrogen chloride (hydrochloric acid) (1 line)
- [2806.20](https://border.bot/countries/united-states/hs-codes/280620) Chlorosulphuric acid (1 line)

### 28.07 Sulphuric acid; oleum

- [2807.00](https://border.bot/countries/united-states/hs-codes/280700) Sulphuric acid; oleum (1 line)

### 28.08 Nitric acid; sulphonitric acids

- [2808.00](https://border.bot/countries/united-states/hs-codes/280800) Nitric acid; sulphonitric acids (2 lines)

### 28.09 Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined

- [2809.10](https://border.bot/countries/united-states/hs-codes/280910) Diphosphorus pentaoxide (1 line)
- [2809.20](https://border.bot/countries/united-states/hs-codes/280920) Phosphoric acid and polyphosphoric acids (4 lines)

### 28.10 Oxides of boron; boric acids

- [2810.00](https://border.bot/countries/united-states/hs-codes/281000) Oxides of boron; boric acids (1 line)

### 28.11 Other inorganic acids and other inorganic oxygen compounds of nonmetals

- [2811.11](https://border.bot/countries/united-states/hs-codes/281111) Other inorganic acids: Hydrogen fluoride (hydrofluoric acid) (1 line)
- [2811.12](https://border.bot/countries/united-states/hs-codes/281112) Other inorganic acids: Hydrogen cyanide (hydrocyanic acid) (1 line)
- [2811.19](https://border.bot/countries/united-states/hs-codes/281119) Other inorganic acids: Other (4 lines)
- [2811.21](https://border.bot/countries/united-states/hs-codes/281121) Other inorganic oxygen compounds of non-metals: Carbon dioxide (1 line)
- [2811.22](https://border.bot/countries/united-states/hs-codes/281122) Other inorganic oxygen compounds of non-metals: Silicon dioxide (2 lines)
- [2811.29](https://border.bot/countries/united-states/hs-codes/281129) Other inorganic oxygen compounds of non-metals: Other (4 lines)

### 28.12 Halides and halide oxides of nonmetals

- [2812.11](https://border.bot/countries/united-states/hs-codes/281211) Chlorides and chloride oxides: Carbonyl dichloride (phosgene) (1 line)
- [2812.12](https://border.bot/countries/united-states/hs-codes/281212) Chlorides and chloride oxides: Phosphorus oxychloride (1 line)
- [2812.13](https://border.bot/countries/united-states/hs-codes/281213) Chlorides and chloride oxides: Phosphorus trichloride (1 line)
- [2812.14](https://border.bot/countries/united-states/hs-codes/281214) Chlorides and chloride oxides: Phosphorus pentachloride (1 line)
- [2812.15](https://border.bot/countries/united-states/hs-codes/281215) Chlorides and chloride oxides: Sulphur monochloride (1 line)
- [2812.16](https://border.bot/countries/united-states/hs-codes/281216) Chlorides and chloride oxides: Sulphur dichloride (1 line)
- [2812.17](https://border.bot/countries/united-states/hs-codes/281217) Chlorides and chloride oxides: Thionyl chloride (1 line)
- [2812.19](https://border.bot/countries/united-states/hs-codes/281219) Chlorides and chloride oxides: Other (2 lines)
- [2812.90](https://border.bot/countries/united-states/hs-codes/281290) Other (2 lines)

### 28.13 Sulfides of nonmetals; commercial phosphorus trisulfide

- [2813.10](https://border.bot/countries/united-states/hs-codes/281310) Carbon disulphide (1 line)
- [2813.90](https://border.bot/countries/united-states/hs-codes/281390) Other (3 lines)

### 28.14 Ammonia, anhydrous or in aqueous solution

- [2814.10](https://border.bot/countries/united-states/hs-codes/281410) Anhydrous ammonia (1 line)
- [2814.20](https://border.bot/countries/united-states/hs-codes/281420) Ammonia in aqueous solution (1 line)

### 28.15 Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassium

- [2815.11](https://border.bot/countries/united-states/hs-codes/281511) Sodium hydroxide (caustic soda): Solid (1 line)
- [2815.12](https://border.bot/countries/united-states/hs-codes/281512) Sodium hydroxide (caustic soda): In aqueous solution (soda lye or liquid soda) (1 line)
- [2815.20](https://border.bot/countries/united-states/hs-codes/281520) Potassium hydroxide (caustic potash) (2 lines)
- [2815.30](https://border.bot/countries/united-states/hs-codes/281530) Peroxides of sodium or potassium (1 line)

### 28.16 Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium

- [2816.10](https://border.bot/countries/united-states/hs-codes/281610) Hydroxide and peroxide of magnesium (1 line)
- [2816.40](https://border.bot/countries/united-states/hs-codes/281640) Oxides, hydroxides and peroxides, of strontium or barium (2 lines)

### 28.17 Zinc oxide; zinc peroxide

- [2817.00](https://border.bot/countries/united-states/hs-codes/281700) Zinc oxide; zinc peroxide (1 line)

### 28.18 Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide

- [2818.10](https://border.bot/countries/united-states/hs-codes/281810) Artificial corundum, whether or not chemically defined (3 lines)
- [2818.20](https://border.bot/countries/united-states/hs-codes/281820) Aluminium oxide, other than artificial corundum (1 line)
- [2818.30](https://border.bot/countries/united-states/hs-codes/281830) Aluminium hydroxide (1 line)

### 28.19 Chromium oxides and hydroxides

- [2819.10](https://border.bot/countries/united-states/hs-codes/281910) Chromium trioxide (1 line)
- [2819.90](https://border.bot/countries/united-states/hs-codes/281990) Other (1 line)

### 28.20 Manganese oxides

- [2820.10](https://border.bot/countries/united-states/hs-codes/282010) Manganese dioxide (1 line)
- [2820.90](https://border.bot/countries/united-states/hs-codes/282090) Other (1 line)

### 28.21 Iron oxides and hydroxides; earth colors containing 70 percent or more by weight of combined iron evaluated as Fe2O3

- [2821.10](https://border.bot/countries/united-states/hs-codes/282110) Iron oxides and hydroxides (5 lines)
- [2821.20](https://border.bot/countries/united-states/hs-codes/282120) Earth colours (1 line)

### 28.22 Cobalt oxides and hydroxides; commercial cobalt oxides

- [2822.00](https://border.bot/countries/united-states/hs-codes/282200) Cobalt oxides and hydroxides; commercial cobalt oxides (2 lines)

### 28.23 Titanium oxides

- [2823.00](https://border.bot/countries/united-states/hs-codes/282300) Titanium oxides (1 line)

### 28.24 Lead oxides; red lead and orange lead

- [2824.10](https://border.bot/countries/united-states/hs-codes/282410) Lead monoxide (litharge, massicot) (1 line)
- [2824.90](https://border.bot/countries/united-states/hs-codes/282490) Other (3 lines)

### 28.25 Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides

- [2825.10](https://border.bot/countries/united-states/hs-codes/282510) Hydrazine and hydroxylamine and their inorganic salts (1 line)
- [2825.20](https://border.bot/countries/united-states/hs-codes/282520) Lithium oxide and hydroxide (1 line)
- [2825.30](https://border.bot/countries/united-states/hs-codes/282530) Vanadium oxides and hydroxides (2 lines)
- [2825.40](https://border.bot/countries/united-states/hs-codes/282540) Nickel oxides and hydroxides (1 line)
- [2825.50](https://border.bot/countries/united-states/hs-codes/282550) Copper oxides and hydroxides (3 lines)
- [2825.60](https://border.bot/countries/united-states/hs-codes/282560) Germanium oxides and zirconium dioxide (3 lines)
- [2825.70](https://border.bot/countries/united-states/hs-codes/282570) Molybdenum oxides and hydroxides (1 line)
- [2825.80](https://border.bot/countries/united-states/hs-codes/282580) Antimony oxides (1 line)
- [2825.90](https://border.bot/countries/united-states/hs-codes/282590) Other (6 lines)

### 28.26 Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts

- [2826.12](https://border.bot/countries/united-states/hs-codes/282612) Fluorides: Of aluminium (1 line)
- [2826.19](https://border.bot/countries/united-states/hs-codes/282619) Fluorides: Other (3 lines)
- [2826.30](https://border.bot/countries/united-states/hs-codes/282630) Sodium hexafluoroaluminate (synthetic cryolite) (1 line)
- [2826.90](https://border.bot/countries/united-states/hs-codes/282690) Other (3 lines)

### 28.27 Chlorides, chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides

- [2827.10](https://border.bot/countries/united-states/hs-codes/282710) Ammonium chloride (1 line)
- [2827.20](https://border.bot/countries/united-states/hs-codes/282720) Calcium chloride (1 line)
- [2827.31](https://border.bot/countries/united-states/hs-codes/282731) Other chlorides: Of magnesium (1 line)
- [2827.32](https://border.bot/countries/united-states/hs-codes/282732) Other chlorides: Of aluminium (1 line)
- [2827.35](https://border.bot/countries/united-states/hs-codes/282735) Other chlorides: Of nickel (1 line)
- [2827.39](https://border.bot/countries/united-states/hs-codes/282739) Other chlorides: Other (10 lines)
- [2827.41](https://border.bot/countries/united-states/hs-codes/282741) Chloride oxides and chloride hydroxides: Of copper (1 line)
- [2827.49](https://border.bot/countries/united-states/hs-codes/282749) Chloride oxides and chloride hydroxides: Other (2 lines)
- [2827.51](https://border.bot/countries/united-states/hs-codes/282751) Bromides and bromide oxides: Bromides of sodium or of potassium (1 line)
- [2827.59](https://border.bot/countries/united-states/hs-codes/282759) Bromides and bromide oxides: Other (2 lines)
- [2827.60](https://border.bot/countries/united-states/hs-codes/282760) Iodides and iodide oxides (3 lines)

### 28.28 Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites

- [2828.10](https://border.bot/countries/united-states/hs-codes/282810) Commercial calcium hypochlorite and other calcium hypochlorites (1 line)
- [2828.90](https://border.bot/countries/united-states/hs-codes/282890) Other (1 line)

### 28.29 Chlorates and perchlorates; bromates and perbromates; iodates and periodates

- [2829.11](https://border.bot/countries/united-states/hs-codes/282911) Chlorates: Of sodium (1 line)
- [2829.19](https://border.bot/countries/united-states/hs-codes/282919) Chlorates: Other (1 line)
- [2829.90](https://border.bot/countries/united-states/hs-codes/282990) Other (4 lines)

### 28.30 Sulfides; polysulfides, whether or not chemically defined

- [2830.10](https://border.bot/countries/united-states/hs-codes/283010) Sodium sulphides (1 line)
- [2830.90](https://border.bot/countries/united-states/hs-codes/283090) Other (4 lines)

### 28.31 Dithionites and sulfoxylates

- [2831.10](https://border.bot/countries/united-states/hs-codes/283110) Of sodium (2 lines)
- [2831.90](https://border.bot/countries/united-states/hs-codes/283190) Other (1 line)


## In other countries

No other national tariff on border.bot has live lines under chapter 28 yet.

- [The Harmonized System text for chapter 28](https://border.bot/hs-codes/28)

Page 1 of 2: subheadings 1 to 100 of 180. Next page: [page 2](https://border.bot/countries/united-states/hs-codes/28?page=2).

- Previous chapter: [27](https://border.bot/countries/united-states/hs-codes/27) Electrical energy
- Next chapter: [29](https://border.bot/countries/united-states/hs-codes/29) Acyclic hydrocarbons

## 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:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/28.json