Tungsten Oxide Hydrodesulfurization Catalyst from Mexico
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 — Mexico → United States
16.5%
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
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