Isoprene (2-Methyl-1,3-Butadiene) Petroleum Grade from Japan
Petroleum-derived isoprene (C5H8) is a conjugated diene unsaturated hydrocarbon extracted from C5 fractions of petroleum cracking. HTS 2901.29.10 covers this as an other unsaturated acyclic hydrocarbon from petroleum, not the first four alkenes. Primary use in synthetic rubber (IR, SBR) production.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide refinery C5 stream analysis confirming isoprene content and petroleum origin
• Polymerization inhibitor certificates required; uninhibited isoprene poses runaway reaction risk
• Classify as UN 1218; ensure refrigerated transport below 20°C to prevent spontaneous polymerization