# 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 2 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 2 of 2.

Source: https://border.bot/countries/united-states/hs-codes/28?page=2
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 2 of 2: subheadings 101 to 180 of 180. Previous page: [page 1](https://border.bot/countries/united-states/hs-codes/28).

## 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.

### 28.32 Sulfites; thiosulfates

- [2832.10](https://border.bot/countries/united-states/hs-codes/283210) Sodium sulphites (1 line)
- [2832.20](https://border.bot/countries/united-states/hs-codes/283220) Other sulphites (1 line)
- [2832.30](https://border.bot/countries/united-states/hs-codes/283230) Thiosulphates (2 lines)

### 28.33 Sulfates; alums; peroxosulfates (persulfates)

- [2833.11](https://border.bot/countries/united-states/hs-codes/283311) Sodium sulphates: Disodium sulphate (3 lines)
- [2833.19](https://border.bot/countries/united-states/hs-codes/283319) Sodium sulphates: Other (1 line)
- [2833.21](https://border.bot/countries/united-states/hs-codes/283321) Other sulphates: Of magnesium (1 line)
- [2833.22](https://border.bot/countries/united-states/hs-codes/283322) Other sulphates: Of aluminium (1 line)
- [2833.24](https://border.bot/countries/united-states/hs-codes/283324) Other sulphates: Of nickel (1 line)
- [2833.25](https://border.bot/countries/united-states/hs-codes/283325) Other sulphates: Of copper (1 line)
- [2833.27](https://border.bot/countries/united-states/hs-codes/283327) Other sulphates: Of barium (1 line)
- [2833.29](https://border.bot/countries/united-states/hs-codes/283329) Other sulphates: Other (7 lines)
- [2833.30](https://border.bot/countries/united-states/hs-codes/283330) Alums (1 line)
- [2833.40](https://border.bot/countries/united-states/hs-codes/283340) Peroxosulphates (persulphates) (4 lines)

### 28.34 Nitrites; nitrates

- [2834.10](https://border.bot/countries/united-states/hs-codes/283410) Nitrites (2 lines)
- [2834.21](https://border.bot/countries/united-states/hs-codes/283421) Nitrates: Of potassium (1 line)
- [2834.29](https://border.bot/countries/united-states/hs-codes/283429) Nitrates: Other (4 lines)

### 28.35 Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined

- [2835.10](https://border.bot/countries/united-states/hs-codes/283510) Phosphinates (hypophosphites) and phosphonates (phosphites) (1 line)
- [2835.22](https://border.bot/countries/united-states/hs-codes/283522) Phosphates: Of mono- or disodium (1 line)
- [2835.24](https://border.bot/countries/united-states/hs-codes/283524) Phosphates: Of potassium (1 line)
- [2835.25](https://border.bot/countries/united-states/hs-codes/283525) Phosphates: Calcium hydrogenorthophosphate (“dicalcium phosphate”) (1 line)
- [2835.26](https://border.bot/countries/united-states/hs-codes/283526) Phosphates: Other phosphates of calcium (1 line)
- [2835.29](https://border.bot/countries/united-states/hs-codes/283529) Phosphates: Other (4 lines)
- [2835.31](https://border.bot/countries/united-states/hs-codes/283531) Polyphosphates: Sodium triphosphate (sodium tripolyphosphate) (1 line)
- [2835.39](https://border.bot/countries/united-states/hs-codes/283539) Polyphosphates: Other (2 lines)

### 28.36 Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate

- [2836.20](https://border.bot/countries/united-states/hs-codes/283620) Disodium carbonate (1 line)
- [2836.30](https://border.bot/countries/united-states/hs-codes/283630) Sodium hydrogencarbonate (sodium bicarbonate) (1 line)
- [2836.40](https://border.bot/countries/united-states/hs-codes/283640) Potassium carbonates (2 lines)
- [2836.50](https://border.bot/countries/united-states/hs-codes/283650) Calcium carbonate (1 line)
- [2836.60](https://border.bot/countries/united-states/hs-codes/283660) Barium carbonate (1 line)
- [2836.91](https://border.bot/countries/united-states/hs-codes/283691) Other: Lithium carbonates (2 lines)
- [2836.92](https://border.bot/countries/united-states/hs-codes/283692) Other: Strontium carbonate (1 line)
- [2836.99](https://border.bot/countries/united-states/hs-codes/283699) Other: Other (6 lines)

### 28.37 Cyanides, cyanide oxides and complex cyanides

- [2837.11](https://border.bot/countries/united-states/hs-codes/283711) Cyanides and cyanide oxides: Of sodium (1 line)
- [2837.19](https://border.bot/countries/united-states/hs-codes/283719) Cyanides and cyanide oxides: Other (3 lines)
- [2837.20](https://border.bot/countries/united-states/hs-codes/283720) Complex cyanides (2 lines)

### 28.39 Silicates; commercial alkali metal silicates

- [2839.11](https://border.bot/countries/united-states/hs-codes/283911) Of sodium: Sodium metasilicates (1 line)
- [2839.19](https://border.bot/countries/united-states/hs-codes/283919) Of sodium: Other (1 line)
- [2839.90](https://border.bot/countries/united-states/hs-codes/283990) Other (2 lines)

### 28.40 Borates; peroxoborates (perborates)

- [2840.11](https://border.bot/countries/united-states/hs-codes/284011) Disodium tetraborate (refined borax): Anhydrous (1 line)
- [2840.19](https://border.bot/countries/united-states/hs-codes/284019) Disodium tetraborate (refined borax): Other (1 line)
- [2840.20](https://border.bot/countries/united-states/hs-codes/284020) Other borates (1 line)
- [2840.30](https://border.bot/countries/united-states/hs-codes/284030) Peroxoborates (perborates) (2 lines)

### 28.41 Salts of oxometallic or peroxometallic acids

- [2841.30](https://border.bot/countries/united-states/hs-codes/284130) Sodium dichromate (1 line)
- [2841.50](https://border.bot/countries/united-states/hs-codes/284150) Other chromates and dichromates; peroxochromates (2 lines)
- [2841.61](https://border.bot/countries/united-states/hs-codes/284161) Manganites, manganates and permanganates: Potassium permanganate (1 line)
- [2841.69](https://border.bot/countries/united-states/hs-codes/284169) Manganites, manganates and permanganates: Other (2 lines)
- [2841.70](https://border.bot/countries/united-states/hs-codes/284170) Molybdates (2 lines)
- [2841.80](https://border.bot/countries/united-states/hs-codes/284180) Tungstates (wolframates) (3 lines)
- [2841.90](https://border.bot/countries/united-states/hs-codes/284190) Other (6 lines)

### 28.42 Other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azides

- [2842.10](https://border.bot/countries/united-states/hs-codes/284210) Double or complex silicates, including aluminosilicates whether or not chemically defined (1 line)
- [2842.90](https://border.bot/countries/united-states/hs-codes/284290) Other (3 lines)

### 28.43 Colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metals

- [2843.10](https://border.bot/countries/united-states/hs-codes/284310) Colloidal precious metals (1 line)
- [2843.21](https://border.bot/countries/united-states/hs-codes/284321) Silver compounds: Silver nitrate (1 line)
- [2843.29](https://border.bot/countries/united-states/hs-codes/284329) Silver compounds: Other (1 line)
- [2843.30](https://border.bot/countries/united-states/hs-codes/284330) Gold compounds (1 line)
- [2843.90](https://border.bot/countries/united-states/hs-codes/284390) Other compounds; amalgams (1 line)

### 28.44 Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products

- [2844.10](https://border.bot/countries/united-states/hs-codes/284410) Natural uranium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing natural uranium or natural uranium compounds (5 lines)
- [2844.20](https://border.bot/countries/united-states/hs-codes/284420) Uranium enriched in U 235 and its compounds; plutonium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing uranium enriched in U 235, plutonium or compounds of these products (4 lines)
- [2844.30](https://border.bot/countries/united-states/hs-codes/284430) Uranium depleted in U 235 and its compounds; thorium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing uranium depleted in U 235, thorium or compounds of these products (6 lines)
- [2844.41](https://border.bot/countries/united-states/hs-codes/284441) Radioactive elements and isotopes and compounds other than those of subheading 2844 10, 2844 20 or 2844 30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive residues: Tritium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing tritium or its compounds (1 line)
- [2844.42](https://border.bot/countries/united-states/hs-codes/284442) Radioactive elements and isotopes and compounds other than those of subheading 2844 10, 2844 20 or 2844 30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive residues: Actinium-225, actinium-227, californium-253, curium-240, curium-241, curium-242, curium-243, curium-244, einsteinium-253, einsteinium-254, gadolinium-148, polonium-208, polonium-209, polonium-210, radium-223, uranium-230 or uranium-232, and their compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements or compounds (1 line)
- [2844.43](https://border.bot/countries/united-states/hs-codes/284443) Radioactive elements and isotopes and compounds other than those of subheading 2844 10, 2844 20 or 2844 30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive residues: Other radioactive elements and isotopes and compounds; other alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds (4 lines)
- [2844.44](https://border.bot/countries/united-states/hs-codes/284444) Radioactive elements and isotopes and compounds other than those of subheading 2844 10, 2844 20 or 2844 30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive residues: Radioactive residues (1 line)
- [2844.50](https://border.bot/countries/united-states/hs-codes/284450) Spent (irradiated) fuel elements (cartridges) of nuclear reactors (1 line)

### 28.45 Isotopes other than those of heading 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically defined

- [2845.10](https://border.bot/countries/united-states/hs-codes/284510) Heavy water (deuterium oxide) (1 line)
- [2845.20](https://border.bot/countries/united-states/hs-codes/284520) Boron enriched in boron-10 and its compounds (1 line)
- [2845.30](https://border.bot/countries/united-states/hs-codes/284530) Lithium enriched in lithium-6 and its compounds (1 line)
- [2845.40](https://border.bot/countries/united-states/hs-codes/284540) Helium-3 (1 line)
- [2845.90](https://border.bot/countries/united-states/hs-codes/284590) Other (1 line)

### 28.46 Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium, or of mixtures of these metals

- [2846.10](https://border.bot/countries/united-states/hs-codes/284610) Cerium compounds (2 lines)
- [2846.90](https://border.bot/countries/united-states/hs-codes/284690) Other (9 lines)

### 28.47 Hydrogen peroxide, whether or not solidified with urea

- [2847.00](https://border.bot/countries/united-states/hs-codes/284700) Hydrogen peroxide, whether or not solidified with urea (1 line)

### 28.49 Carbides, whether or not chemically defined

- [2849.10](https://border.bot/countries/united-states/hs-codes/284910) Of calcium (1 line)
- [2849.20](https://border.bot/countries/united-states/hs-codes/284920) Of silicon (2 lines)
- [2849.90](https://border.bot/countries/united-states/hs-codes/284990) Other (4 lines)

### 28.50 Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49

- [2850.00](https://border.bot/countries/united-states/hs-codes/285000) Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49 (5 lines)

### 28.52 Inorganic or organic compounds of mercury, whether or not chemically defined, excluding amalgams

- [2852.10](https://border.bot/countries/united-states/hs-codes/285210) Chemically defined (2 lines)
- [2852.90](https://border.bot/countries/united-states/hs-codes/285290) Other (2 lines)

### 28.53 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

- [2853.10](https://border.bot/countries/united-states/hs-codes/285310) Cyanogen chloride (chlorcyan) (1 line)
- [2853.90](https://border.bot/countries/united-states/hs-codes/285390) Other (4 lines)


## 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 2 of 2: subheadings 101 to 180 of 180. Previous page: [page 1](https://border.bot/countries/united-states/hs-codes/28).

- 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?page=2