Ethylidene Norbornene from Mexico
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 — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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