Other clays
Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths: > Other clays
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Subheadings
Products classified under HTS 2508.40.01
Kaolin Clay Powder
Finely ground kaolin clay, also known as china clay, used primarily in ceramics, paper production, and as a filler in paints. Classified under HTS 2508.40.01 as 'other clays' since it is a natural clay not specified elsewhere in heading 2508 and excluding expanded clays of heading 6806.
Fire Clay Powder
Refractory-grade fire clay ground into powder for brick manufacturing and high-temperature applications. Classified in HTS 2508.40.01 as other clays, provided not calcined into mullite or chamotte.
Earthenware Clay Mix
Blended natural clays for low-fire earthenware pottery. Remains under HTS 2508.40.01 as other clays if not agglomerated or calcined.
Bentonite Clay Lumps
Natural bentonite clay in lump form, valued for its swelling properties in drilling muds, cat litter, and sealants. Falls under HTS 2508.40.01 as 'other clays,' encompassing natural bentonite not expanded or processed into articles.
Ball Clay for Ceramics
High-plasticity ball clay mined for use in fine porcelain and sanitaryware production. HTS 2508.40.01 covers this as 'other clays'—natural, unexpanded clays used in traditional ceramics.
Sepiolite Clay Absorbent
Natural sepiolite clay in absorbent form for cat litter and industrial spills, not expanded. HTS 2508.40.01 includes this fibrous clay as 'other clays' distinct from meerschaum.
Attapulgite Clay Granules
Granular attapulgite clay used in suspension agents for pesticides and drilling fluids. As a natural, non-expanded clay, it fits HTS 2508.40.01 'other clays.'
Common Brick Clay
Surface-mined common clay suitable for traditional brick and tile production. HTS 2508.40.01 designates it as 'other clays,' raw and uncalcined.