Tungsten Carbide Catalyst Powder from China
Fine tungsten carbide powder serves as a heterogeneous catalyst in Fischer-Tropsch synthesis and hydrocracking processes. Classified under HTS 3815.90.1000 as it consists wholly of inorganic tungsten compounds designed for reaction acceleration. Its high surface area enhances catalytic efficiency in petrochemical applications.
Duty Rate — China → United States
44%
Rate breakdown
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)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Submit particle size analysis and BET surface area reports to confirm catalytic-grade specifications
• Include manufacturer specs showing use in reaction initiation, avoiding classification as mere metal powder
• Check for tungsten content purity; impurities may trigger reclassification under 2849