3911.90.91/Polysulfone Resin Pellets/Japan

Polysulfone Resin Pellets from Japan

Polysulfone resin in pellet form is an engineering thermoplastic with ether and sulfone linkages, used for medical devices and membranes. It is classified under HTS 3911.90.91 as polysulfones in primary forms, specified in note 3, unmodified.

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%

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Import Tips

• FDA compliance docs if for medical use; declare bisphenol-A/sulfur dioxide monomers

• Pellet size <5mm confirms primary form; larger may be 3920 profiles