Calcined Bentonite Clay from Germany
Bentonite subjected to controlled calcining to enhance adsorption properties for foundry sand bonding, still classifiable as clay under the heading allowing calcined forms. Excluded items like dolomite mixes (3816) do not apply to this pure mineral product.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide thermal processing certificates showing calcination temperature below fusion to confirm clay status
• Separate from additives; mixtures with resins could classify as Chapter 38 preparations
• Test for phase changes via XRD to rule out conversion to mullite (also in 2508 but different stats)