Tungsten Oxide Hydrodesulfurization Catalyst from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
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