Ethylidene Norbornene
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified by bicyclic cyclopentane structure
Alternative classification considers norbornene ring system as cyclic hydrocarbon.
If imported as EPDM latex or solution
Polymerized forms containing residual monomer classify as synthetic rubber.
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Import Tips & Compliance
• 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
Related Products under HTS 2901.29.10.50
1-Octene
1-Octene (C8H16) is a linear alpha-olefin produced via ethylene oligomerization from petroleum feedstocks. Classified under HTS 2901.29.1050 as an 'other' petroleum-derived unsaturated acyclic hydrocarbon used primarily in linear low-density polyethylene (LLDPE) production. Its terminal double bond distinguishes it from saturated paraffins.
Isobutylene
Isobutylene (2-methylpropene, C4H8) is a branched unsaturated hydrocarbon from petroleum refinery C4 streams. HTS 2901.29.1050 applies as 'other' petroleum-derived acyclic unsaturated hydrocarbon, separated via extractive distillation. Primary use in butyl rubber and methacrylate production.
Diisobutylene
Diisobutylene (2,4,4-trimethylpentene isomers) results from isobutylene dimerization in petroleum processing. Classified HTS 2901.29.1050 as petroleum-derived unsaturated acyclic C8 hydrocarbon mixture of defined isomers. Used in antioxidants, lube additives, and fuel detergents.
1-Hexene
1-Hexene is an acyclic unsaturated hydrocarbon with the formula C6H12, featuring a terminal double bond. It falls under HTS 2901.29.1050 as it is derived from petroleum through cracking processes and is not specifically enumerated elsewhere in the unsaturated acyclic hydrocarbons subheading. This chemical serves as a comonomer in polyethylene production.
1-Decene
1-Decene is a C10 alpha-olefin derived from petroleum via Ziegler process oligomerization. It qualifies for HTS 2901.29.1050 as a separate, chemically defined unsaturated acyclic hydrocarbon from petroleum sources, used in synthetic lubricants and detergents. Polymer grade specifications ensure classification as pure compound.
4-Methyl-1-Pentene
4-Methyl-1-pentene is a branched alpha-olefin (C6H12) produced from petroleum raffinates. It falls under HTS 2901.29.1050 as an 'other' petroleum-derived unsaturated acyclic hydrocarbon, distinct from straight-chain olefins. Used as comonomer in specialty polypropylenes and as chemical intermediate.