1,3-Butadiene (refined isomer)
While primarily under 2901.24, highly purified 1,3-butadiene can be considered a butene-related diene isomer under HTS 2901.23.00.00 when specified as such. Used exclusively for synthetic rubber (SBR) production.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If standard crude or technical grade
Primary classification for butadiene regardless of isomer purity.
If imported as synthetic rubber latex
Polymerized forms classified in Chapter 40 rubber products.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide distillation specs showing <50ppm impurities for pure compound status
• Include polymerization inhibitor certificate to prevent reclassification
• Monitor for butene/butadiene mixture thresholds triggering 2901.29
Related Products under HTS 2901.23.00.00
1-Butene (But-1-ene)
1-Butene is a colorless, flammable acyclic unsaturated hydrocarbon with the formula CH2=CH-CH2-CH3, classified under HTS 2901.23.00.00 as a pure isomer of butene. It serves as a key monomer in producing linear low-density polyethylene (LLDPE) and other polymers.
cis-2-Butene
cis-2-Butene is the cis isomer of 2-butene, an acyclic alkene with formula CH3-CH=CH-CH3, falling under HTS 2901.23.00.00 for butene isomers. It is used in organic synthesis and as a research chemical.
trans-2-Butene
trans-2-Butene, the trans stereoisomer of 2-butene (CH3-CH=CH-CH3), is a separate chemically defined compound under HTS 2901.23.00.00. Commonly used in petrochemical research and isomerization studies.
Isobutene (2-Methylpropene)
Isobutene, or 2-methylpropene (CH2=C(CH3)2), is a branched butene isomer classified under HTS 2901.23.00.00 as an acyclic unsaturated hydrocarbon. Primary use is in manufacturing methyl tert-butyl ether (MTBE) and polyisobutylene.
2-Butene Industrial Grade
Industrial 2-butene (mixed cis/trans isomers) is a chemically defined butene mixture under HTS 2901.23.00.00, used in solvent production and alkylation processes.
Butene-1 Polymerization Grade
High-purity butene-1 (>99.5%) specifically for LLDPE copolymer production, classified as pure butene isomer under HTS 2901.23.00.00.