HS chapter 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
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Key facts
- Chapter
- 28
- Description
- Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
- Headings
- 50
- Subheadings
- 180
- Edition
- HS2022
Summary
HS chapter 28 covers inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes. It has 50 headings, 28.01 to 28.53, and 180 six-digit subheadings in HS2022. National tariff lines under chapter 28 are live on border.bot for the United States (336 lines, also used by 1 other country).
What this chapter covers
HS chapter 28 covers inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes.
It has 50 headings, 28.01 to 28.53, and 180 six-digit subheadings in HS2022.
Subheadings 101 to 180 of 180, page 2 of 2.
28.33 Sulphates; alums; peroxosulphates (persulphates)
- 2833.11Sodium sulphates: Disodium sulphate
- 2833.19Sodium sulphates: Other
- 2833.21Other sulphates: Of magnesium
- 2833.22Other sulphates: Of aluminium
- 2833.24Other sulphates: Of nickel
- 2833.25Other sulphates: Of copper
- 2833.27Other sulphates: Of barium
- 2833.29Other sulphates: Other
- 2833.30Alums
- 2833.40Peroxosulphates (persulphates)
28.35 Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined
- 2835.10Phosphinates (hypophosphites) and phosphonates (phosphites)
- 2835.22Phosphates: Of mono- or disodium
- 2835.24Phosphates: Of potassium
- 2835.25Phosphates: Calcium hydrogenorthophosphate (“dicalcium phosphate”)
- 2835.26Phosphates: Other phosphates of calcium
- 2835.29Phosphates: Other
- 2835.31Polyphosphates: Sodium triphosphate (sodium tripolyphosphate)
- 2835.39Polyphosphates: Other
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
- 2844.10Natural uranium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing natural uranium or natural uranium compounds
- 2844.20Uranium 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
- 2844.30Uranium 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
- 2844.41Radioactive 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
- 2844.42Radioactive 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
- 2844.43Radioactive 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
- 2844.44Radioactive 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
- 2844.50Spent (irradiated) fuel elements (cartridges) of nuclear reactors
28.47 Hydrogen peroxide, whether or not solidified with urea
- 2847.00Hydrogen peroxide, whether or not solidified with urea
28.50 Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49
- 2850.00Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49
What it doesn’t cover
Chapter 27, before it, covers mineral fuels, mineral oils and products of their distillation; bituminous substances; mineral waxes; chapter 29, after it, covers organic chemicals.
How it is structured
Chapter 28 is the first level of the Harmonized System. Its headings add two digits to the chapter number (28.01), and each heading's subheadings add two more.
In other countries
National tariff lines under chapter 28 are live on border.bot for the United States (336 lines, also used by 1 other country).
- United States336 lines, used by 1 other country
Frequently asked questions
What does HS chapter 28 cover?
HS chapter 28 covers inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes.
How many headings and subheadings are in HS chapter 28?
HS chapter 28 has 50 headings and 180 six-digit subheadings in HS2022.
Which countries’ tariffs list national lines in HS chapter 28?
National tariff lines under chapter 28 are live on border.bot for the United States (336 lines, also used by 1 other country).
Sources and updates
The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.
This page was last updated on 11 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.