2901.23.00.00/Mixed Butene Isomers (C4 Raffinate)/Japan

Mixed Butene Isomers (C4 Raffinate) from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

Calculate with your customs value Verify classification with AI

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