Bentonite Clay Swellable Grade
Sodium montmorillonite bentonite clay with high swelling capacity, used in drilling muds and sealants. HTS 2508.40.0150 covers this as 'other clays', unexpanded and suitable for industrial applications like oilfield services.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically activated or precipitated
Modified clays resembling synthetic manganese oxides or similar fall under inorganic chemicals.
If sold as expanded lightweight aggregate
Expanded forms excluded by chapter note (f) and chapter notes for 6806.
If pebbled or granular for paving/road use
Pebble clays or granular forms prioritized under heading 2517 per chapter classification note.
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Import Tips & Compliance
• Certify montmorillonite content (>70%) and cation exchange capacity for proper 'other clays' declaration
• Declare intended end-use (e.g
• drilling) but note classification is material-based, not use-based
Related Products under HTS 2508.40.01.50
Sepiolite Meerschaum Ore
Natural sepiolite clay mineral, known as meerschaum ore, used for pipes and absorbents. Falls under HTS 2508.40.0150 as other clays, explicitly covered in heading 2530 note but prioritized here if not polished.
Kaolin Clay Powder
Finely ground kaolin clay, also known as china clay, used primarily in ceramics, paper manufacturing, and as a filler in paints. Classified under HTS 2508.40.0150 as 'other clays' (excluding expanded clays), in crude or powdered form, not further processed beyond grinding. It meets the chapter definition for natural clays suitable for industrial applications.
Ball Clay for Ceramics
Plastic ball clay mined and processed for pottery and tile production, valued for its fine grain and binding properties. Falls under HTS 2508.40.0150 as 'other clays' not elsewhere specified, including uncalcined kaolinitic clays for industrial use.
Fuller's Earth Attapulgite
Absorbent attapulgite fuller's earth used for oil refining and cat litter bases. Classified in HTS 2508.40.0150 as other clays, representing natural mineral absorbents not calcined or expanded.
Common Brick Clay Raw
Unprocessed loamy clay suitable for manufacturing common bricks and tiles. HTS 2508.40.0150 includes such 'other clays' in natural state, not prepared for immediate refractory use.
Calcined Kaolin Metakaolin
Partially calcined kaolin producing metakaolin for high-performance concrete Pozzolanic reaction. HTS 2508.40.0150 includes calcined 'other clays' unless specifically chamotte; metakaolin qualifies as processed clay.