Tungsten Oxide Hydrodesulfurization Catalyst from China
WO3-based catalysts promoted with nickel or cobalt for hydrodesulfurization of petroleum fractions. Falls under HTS 3815.90.1000 when consisting wholly of inorganic tungsten compounds without organic binders. Essential for ultra-low sulfur diesel production.
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
• XRD analysis confirming crystalline WO3 phase required for classification verification
• Declaration must specify petroleum refining end-use to distinguish from other applications
• Ensure no carbon or organic residues from manufacturing process exceed specification limits