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2901.23.00.00/Mixed Butene Isomers (C4 Raffinate)/Mexico

Mixed Butene Isomers (C4 Raffinate) from Mexico

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 — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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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