Butene (Butylene) and isomers thereof
Acyclic hydrocarbons: > Unsaturated: > Butene (Butylene) and isomers thereof
Duty Rate (from China)
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
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified 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.
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.
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.
Isobutylene Research Grade
Ultra-high purity isobutylene (>99.99%) for laboratory and pharmaceutical synthesis, classified under HTS 2901.23.00.00 as a butene isomer.
Mixed Butene Isomers (C4 Raffinate)
C4 raffinate stream containing 1-butene, 2-butene (cis/trans), and isobutene, classified as butene isomers under HTS 2901.23.00.00 when meeting purity standards.
2-Methyl-1-Butene
2-Methyl-1-butene, a branched pentene often associated with C4/C5 processing, classified under butene isomers HTS 2901.23.00.00 when pure.