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.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If fuller's earth (bleachable clays)
Fuller's earth, a specific type of absorbent clay, has its own subheading 2508.30, distinct from general bentonite.
If processed into expanded granules
Chapter notes exclude expanded clays from 2508, directing them to 6806 for refractory or lightweight uses.
If pebbly, stony, or gravelly mixtures
Per chapter note, products classifiable in 2517 (pebbles, gravel) take precedence over other Chapter 25 headings.
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Import Tips & Compliance
• Provide swell index test results and CEC (cation exchange capacity) data to substantiate bentonite classification under other clays
• Ensure shipments are free of synthetic additives; pure natural clays only qualify here—mixtures may go to Chapter 38
Related Products 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.
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.'