Isopentane 99% Purity from China
Isopentane (2-methylbutane), a branched saturated acyclic hydrocarbon used as a blowing agent in polystyrene foam production. Classified under HTS 2901.10.30.00 as a chemically defined isomer per Chapter 29 note (a). Differs from n-pentane in its branched structure.
Duty Rate — China → United States
37.5%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Provide GC-MS analysis confirming 99% isopentane content to prevent disputes; comply with EPA foaming agent regulations
• Pitfall: improper storage leading to vapor pressure issues in shipping