Tungsten Molybdate Catalyst Precursor from Mexico
Ammonium metatungstate and molybdate blend serving as precursor for hydrodesulfurization catalysts in oil refining. Inorganic salts mixture activated at high temperatures. Fits 3824.99.3500 as unspecified tungsten inorganic mixtures.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Certify as catalyst precursor with activation process details for proper heading
• Monitor REACH-like restrictions on molybdenum-tungsten compounds
• Package in moisture-proof containers to maintain mixture stability during import