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HSChapter 29
U.S. imports of butene (butylene) and isomers thereof (HS 2901230000) totaled $359K in June 2026, traded with 2 countries.
Importers of Butene (butylene) and Isomers Thereof paid $26K in duties in June 2026 — an effective duty rate of 10% on $259K in dutiable value, based on actual customs collections rather than the published tariff schedule. Butene (butylene) and Isomers Thereof imports of $359K in June 2026 ran 330% above the year-to-date monthly average of $83K.
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Monthly import values over time
No geographic breakdown available
U.S. trade for this product is not broken down by state or port in the latest Census Bureau release.