Chapter 25: Salt; sulfur; earths and stone; plastering materials, lime and cement
HTS heading 2508: Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte…
10 numbered lines under heading 2508, including 8 10-digit statistical lines. The first six digits are the international HS subheading; the general column is the normal US duty rate.
| HTS code | Description | Unit | General | Special | Column 2 |
|---|---|---|---|---|---|
| 2508 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths: | ||||
| 2508.10.00.00 | Bentonite | t | Free | $3.20/t | |
| 2508.30.00.00 | Fire-clay | t | Free | $1.97/t | |
| 2508.40.01 | Other clays | Free | $1.97/t | ||
| 2508.40.01.10 | Common blue clay and other ball clays | t | |||
| 2508.40.01.20 | Decolorizing earths and fuller's earth | t | |||
| 2508.40.01.50 | Other | t | |||
| 2508.50.00.00 | Andalusite, kyanite and sillimanite | t | Free | Free | |
| 2508.60.00.00 | Mullite | t | Free | 30% | |
| 2508.70.00.00 | Chamotte or dinas earth | t | Free | Free |
Statistical (10-digit) lines without a rate use the rate of the 8-digit line above them. Additional duties such as Section 301 and Section 232 may apply; check them with the tariff checker.
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Request a free auditSource: Harmonized Tariff Schedule of the United States, 2026 HTS Revision 20 (effective 2026-09-28), U.S. International Trade Commission (hts.usitc.gov), imported 2026-10-07. Reference only; not legal or customs advice or a binding classification. Additional duties under Chapter 99 may apply. ShipWave is not affiliated with the USITC or U.S. Customs and Border Protection.