Syndiotactic Polystyrene Pellets (SPS) from Japan
Syndiotactic Polystyrene (SPS) features crystalline structure from stereospecific polymerization, classified in primary pellet form under HTS 3903.19.00.00 as other polystyrene. Used in high-heat engineering applications like automotive parts.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit polymerization process details confirming stereoregularity without comonomers
• High glass transition temp (100°C+) helps distinguish from general GPPS
• Avoid declaring as 'specialty polymer' without COA, risking 3904 classification