Magnesium Oxide Polymerization Catalyst from Mexico
High-purity MgO powder serving as catalyst in polypropylene production. Classified in 3815.90.3000 for its wholly inorganic composition and role as reaction initiator.
Duty Rate — Mexico → United States
10%
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
• Surface area specifications (>100m²/g) distinguish catalytic grade from refractory grade
• Include polymerization reaction data demonstrating accelerator function
• Antidumping duties may apply from certain origins; verify scope rulings