Mixed Butene Isomers (C4 Raffinate) from Canada
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.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Detailed GC composition report required showing butene dominance (>90%)
• ISO tank documentation must specify exact isomer breakdown
• Monitor butadiene content (<50ppm) to avoid 2901.24 reclassification