# HTS 2508: Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths:

https://geopax.app/tariffs/catalog/25/2508

Source: [2026 HTS Revision 21 (October 9, 2026)](https://hts.usitc.gov/search?query=2508). Additional duties by country of origin may apply; estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 2508: Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 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 | Free |  | $3.20/t | t |
| 2508.30.00.00 |   Fire-clay | Free |  | $1.97/t | t |
| 2508.40.01 |   Other clays | Free |  | $1.97/t |  |
| 2508.40.01.10 |     Common blue clay and other ball clays | Free |  | $1.97/t | t |
| 2508.40.01.20 |     Decolorizing earths and fuller's earth | Free |  | $1.97/t | t |
| 2508.40.01.50 |     Other | Free |  | $1.97/t | t |
| 2508.50.00.00 |   Andalusite, kyanite and sillimanite | Free |  | Free | t |
| 2508.60.00.00 |   Mullite | Free |  | 30% | t |
| 2508.70.00.00 |   Chamotte or dinas earth | Free |  | Free | t |