Vinyl Norbornene Petrochemical from Mexico
5-Vinyl-2-norbornene (VNB, C9H10) Diels-Alder adduct from petroleum cyclopentadiene and butadiene. Despite bicyclic structure, HTS 2901.29.10 as petroleum unsaturated acyclic hydrocarbon derivative. ENB alternative in EPDM rubber terpolymerization.
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
• Specify endo/exo ratio (85/15 typical) affecting copolymer reactivity
• Solid at room temp; specify molten handling temp 60-80°C
• Low chlorine (<10 ppm) critical for Ziegler-Natta catalyst compatibility