Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths
8 declarable lines
Heading 2508 covers other clays not including expanded clays of heading 6806, plus andalusite, kyanite, sillimanite, mullite, and chamotte or dinas earths. It is split first by material: bentonite, fire-clay, other clays, andalusite/kyanite/sillimanite, mullite, and chamotte or dinas earths. All listed lines have a general (MFN) rate of Free.
Products in this heading
- Raw bentonite clay
- Fire-clay
- Ball clay
- Fuller's earth
- Andalusite
- Kyanite
- Mullite
- Chamotte
How to choose the right subheading
- Identify the material first: bentonite, fire-clay, other clay, andalusite/kyanite/sillimanite, mullite, or chamotte/dinas earth.
- For other clays, decide between common blue clay and ball clay, decolorizing earths and fuller's earth, or other.
- Check whether the material is calcined; calcination alone does not move it out of heading 2508.
- Confirm the material is not expanded clay; expanded clays are excluded and go to heading 6806.
Often confused with
- Heading 6806Expanded clay pellets for lightweight aggregate
Expanded clays are expressly excluded from heading 2508.
- Heading 2505Natural silica sand
Natural sands are classified in heading 2505, not as clay.
- Heading 2506Quartz powder
Quartz is covered by heading 2506.
- Heading 2504Natural graphite
Graphite is a separate mineral in heading 2504.
- Heading 6902Fired refractory bricks made from fire-clay
Fired refractory ceramic goods are not raw clay of heading 2508.
Frequently asked questions
What is the HTS code for bentonite?
Bentonite is classified under 2508.10.00.00. Its general (MFN) rate is Free.
What is the duty on fire-clay?
Fire-clay is classified under 2508.30.00.00. The general (MFN) rate is Free.
How do I classify mullite?
Mullite is classified under 2508.60.00.00. The general (MFN) rate for that line is Free.
Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.