Liquefied Butylene Gas (Mixed Isomers)
Liquefied butylene (C4H8), including 1-butene, 2-butene, and isobutylene isomers, used in synthetic rubber and plastics production. HTS 2711.14.00 covers these as liquefied butylene unsaturated hydrocarbons.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If predominantly n-butane or isobutane
Saturated C4 hydrocarbons (butanes) classify separately from unsaturated butylenes.
If for purified 1-butene or cis-2-butene over 95% purity
Individual purified unsaturated acyclic hydrocarbons move to Chapter 29.
If when imported as C4 raffinate stream with multiple gases
Other liquefied gaseous hydrocarbon mixtures not specifically ethylene/propylene/etc.
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
• Submit gas chromatography (GC) analysis confirming butylene content exceeds other C4 components
• Ensure cryogenic storage tanks have dual containment for leak prevention during transit
• Label as 'UN 1012 Butylene' for proper hazmat shipping and customs declaration
Related Products under HTS 2711.14.00
Liquefied Ethylene Gas
Liquefied ethylene (C2H4) is a key petrochemical feedstock used primarily in the production of polyethylene plastics and other chemicals. It falls under HTS 2711.14.00 as a liquefied petroleum gas consisting of ethylene, meeting the classification for unsaturated hydrocarbons in gaseous form under pressure.
Liquefied Propylene (Polymer Grade)
Polymer-grade liquefied propylene (C3H6) is high-purity propylene liquefied under pressure, used mainly for polypropylene resin manufacturing. Classified under HTS 2711.14.00 due to its status as liquefied unsaturated hydrocarbon gas.
Liquefied Propylene-Propane Mix (60/40)
A liquefied mixture containing 60% propylene and 40% propane, used as chemical feedstock. Classified under HTS 2711.14.00 because propylene (unsaturated) is the principal component among named gases.
Cryogenic Liquefied Ethylene for PE Production
Ultra-pure ethylene liquefied at cryogenic temperatures (-104°C) specifically for high-density polyethylene (HDPE) manufacturing. HTS 2711.14.00 applies to this liquefied ethylene petrochemical.
Polymerization-Grade Liquefied Butadiene Mix
Liquefied C4 stream with 40-60% 1,3-butadiene plus butylenes, inhibited for rubber polymerization. Principal butadiene content places it in HTS 2711.14.00.
Liquefied Propylene for Acrylic Acid Production
Liquefied propylene feedstock for oxidation to acrylic acid and acrylates. Chemical-grade purity qualifies under HTS 2711.14.00 as liquefied propylene.