Polystyrene Compounding Base Resin from China
Narrow molecular weight distribution polystyrene resin designed for compounding, imported in primary form under HTS 3903.19.00.00. Serves as base for custom blends in electronics and packaging industries.
Duty Rate — China → United States
41.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 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
• Document polydispersity index (<2.0) to confirm unmodified homopolymer status
• Separate from additives in shipping to prevent blend reclassification
• CBP may test for fillers; ensure pure resin declaration