Tungsten Silicate Binder for Foundry Molds from China
A mixture of sodium silicate and tungsten compounds used as a binder in foundry mold production. It provides high-temperature resistance and strength for sand cores in metal casting. Classified under 3824.99.3500 as a mixture of two or more inorganic compounds containing tungsten, specifically for foundry applications.
Duty Rate — China → United States
41.5%
Rate breakdown
9903.03.0110%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
9903.88.0325%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)
Import Tips
• Verify exact tungsten content and inorganic composition via lab analysis to confirm 3824.99.3500 classification
• Include Safety Data Sheets (SDS) and foundry end-use documentation to avoid misclassification as general chemicals
• Watch for EPA restrictions on tungsten compounds; ensure TSCA compliance for US entry