Chamotte Fire-Clay from Mexico
Chamotte is pre-fired fire-clay crushed into granules, used in refractory castables for improved strength. Falls under HTS 2508.30.00.00 as dinas earths or chamotte, a semi-processed clay product. Key for glass furnace repairs.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Document firing temperature (typically 1200-1400°C) to prove chamotte status vs raw clay
• Use ISPM-15 compliant pallets for bulk bags to prevent fumigation delays
• Monitor for iron impurities; high Fe2O3 may invoke earth color exclusions to 2530