Fluorosulfonated Polymer Powder (for Membranes) from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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