Liquefied Butylene Gas (Mixed Isomers) from Mexico
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.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• 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