Ethylidene Norbornene from Canada
Ethylidene norbornene (ENB) is a diene comonomer (C10H14) derived from petroleum DCPD streams. Despite bicyclic structure, classified under HTS 2901.29.1050 as petroleum-derived unsaturated acyclic hydrocarbon per principal chain rule. Essential for EPDM rubber production providing vulcanization sites.
Duty Rate — Canada → United States
10%
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
Import Tips
• Provide NY ruling reference (HQ H095677) confirming acyclic classification despite bicyclic appearance
• Peroxide inhibitor required; declare concentration (50-100 ppm) to prevent exotherm during storage
• Distinguish from dicyclopentadiene (Chapter 2902) by double bond position and GC retention time