Polysulfone Resin Pellets from China
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 — China → United States
44%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
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