Heading 2508: Other clays (not including expanded clays of heading 6806), andalusite, kyanite and…
Every line of heading 2508 in the U.S. Harmonized Tariff Schedule, with its general (column 1) duty rate. Open a code for the landed cost calculator, trade agreement rates and email alerts if the rate changes.
Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths
Chapter 25: Salt; sulfur; earths and stone; plaster, lime and cement. Schedule checked on November 8, 2026.
Not always the total: additional chapter 99 duties (such as Section 232 or Section 301), antidumping or countervailing duties may apply depending on the country of origin. See recent chapter 99 changes →
Tariff lines
| HTS code | Official description | General rate |
|---|---|---|
| 2508.10.00.00 | Bentonite | Free |
| 2508.30.00.00 | Fire-clay | Free |
| 2508.40.01 | Other clays | Free |
| 2508.40.01.10 | Common blue clay and other ball clays | |
| 2508.40.01.20 | Decolorizing earths and fuller's earth | |
| 2508.40.01.50 | Other | |
| 2508.50.00.00 | Andalusite, kyanite and sillimanite | Free |
| 2508.60.00.00 | Mullite | Free |
| 2508.70.00.00 | Chamotte or dinas earth | Free |
Exporting this product from the U.S.?
Exports are reported with Schedule B numbers. Heading 2508 has 8 of them. Schedule B lookup →
- 2508.10.0000BENTONITE, WHETHER OR NOT CALCINED
- 2508.30.0000FIRE CLAY, WHETHER OR NOT CALCINED
- 2508.40.0110COMMON BLUE CLAY AND OTHER BALL CLAYS
- 2508.40.0120DECOLORIZING EARTHS AND FULLER'S EARTH INCLUDING CALCINED
- 2508.40.0150CLAYS, NESOI
- 2508.50.0000ANDALUCITE, KYANITE AND SILLIMANITE
- 2508.60.0000MULLITE
- 2508.70.0000CHAMOTTE OR DINAS EARTH
Source: U.S. International Trade Commission, Harmonized Tariff Schedule; Schedule B: U.S. Census Bureau. Information only, not legal or customs advice; U.S. Customs and Border Protection decides the classification and the duty. Confirm with a licensed customs broker before you ship.
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