Fluorosulfonated Polymer Powder (for Membranes) from Mexico
Fluorinated polymer powder with sulfonyl groups for ion-exchange membranes, classified as other fluoropolymers in HTS 3904.69.5000 primary forms. Chemical modification keeps it in 'other' per subheading note (a)(3).
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
• Document modification process to justify 'other' classification vs unmodified base polymer
• Declare intended end-use as industrial resin, not fabricated article
• Ensure powder form; dispersions classify under 3824