Liquefied n-Butene (cis/trans-2-Butene Mix)
Liquefied n-butene, primarily a mixture of cis- and trans-2-butene isomers, is a straight-chain butylene gas classified under HTS 2711.14.00.30. It is utilized in the synthesis of maleic anhydride and as a fuel gas component.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If saturated butane content exceeds 50% by volume
Predominantly saturated C4 hydrocarbons (butanes) classify under butanes LPG subheading.
If cyclic butene derivatives predominate
Cyclic hydrocarbons, even C4 structures, fall under Chapter 29 rather than petroleum gases.
If sold as polymer-grade with propylene admixture
Propylene-butylene copolymers or high propylene blends may classify under propylene if >50% propylene.
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Import Tips & Compliance
• Submit isomer ratio certificates (typically 50/50 cis/trans) to distinguish from 1-butene or isobutylene
• Ensure DOT/UN 1012 classification for 2-butene and proper placarding on transport containers
• Monitor volatility specs against Chapter Note definitions to prevent reclassification as light oils
Related Products under HTS 2711.14.00.30
Liquefied 1-Butene (Butylene-1)
Liquefied 1-butene is a petroleum-derived gaseous hydrocarbon with the formula C4H8, classified under HTS 2711.14.00.30 as butylene due to its butylene chemical structure. It is commonly used as a monomer in the production of polyethylene and other polymers.
Liquefied Isobutylene (2-Methylpropene)
Liquefied isobutylene, also known as 2-methylpropene, is a branched C4 olefin gaseous hydrocarbon liquefied under pressure, falling under HTS 2711.14.00.30 as butylene. It serves as a key intermediate in producing methacrylic acid, butyl rubber, and fuels.
Liquefied Raffinate-2 Butylene Stream
Liquefied raffinate-2 is a refinery stream containing 70-90% butylene (mixed isomers) after butadiene extraction, classified as butylene under HTS 2711.14.00.30. Primarily used in gasoline blending and alkylation processes.
Polymer-Grade Liquefied Butylene (C4 Olefin Mix)
Polymer-grade liquefied butylene is a high-purity C4 olefin mixture (85%+ total butylene isomers) for polyethylene co-monomer use, falling under HTS 2711.14.00.30. Specifications ensure low impurities for resin production.