Styrofoam Beads EPS from Mexico
Expandable polystyrene beads used for molding into foam products like packaging and insulation. These pre-expanded or unexpanded beads contain pentane as a blowing agent and fall under HTS 3903.11.00.00 as expandable polystyrene in primary form before molding or expansion into finished articles.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify monomer content exceeds 95% styrene per subheading note (a)(1) to confirm classification as polystyrene
• Include technical data sheets proving expandability and primary form status to avoid reclassification as finished foam
• Check for hazardous material declarations due to pentane blowing agent content