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SITCSection 3
U.S. imports of liquefied butane (SITC 34250) totaled $81.3M in April 2026, traded with 25 countries.
Importers of Liquefied Butane paid $10K in duties in April 2026 — an effective duty rate of 11% on $89K in dutiable value, based on actual customs collections rather than the published tariff schedule. Liquefied Butane imports of $81.3M in April 2026 ran 21% above the year-to-date monthly average of $67.1M.
Last updated: April 2026 dataButane, transported and stored as a liquefied petroleum gas under moderate pressure, splits commercially into normal butane (n-butane) and isobutane, each serving distinct end markets. Normal butane is blended into motor gasoline to adjust Reid Vapor Pressure (RVP) seasonally, while isobutane is a key alkylation unit feedstock in refinery operations. Seasonal RVP regulations — which restrict butane blending into gasoline during summer months in many US regions — create predictable import demand cycles that traders and logistics planners must account for.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
EPA RVP standards limit the volatility of gasoline sold during summer months (typically June 1 through September 15), which restricts butane blending into motor fuel during that period. As a result, butane import and storage activity tends to concentrate in the fall and winter, when blending restrictions ease and demand for heating and refinery feedstock use rises. Importers and traders should align supply contracts and storage arrangements with this seasonal pattern.
Both n-butane and isobutane are C4 hydrocarbons that fall within the liquefied butane SITC heading, but they are chemically distinct isomers with different refinery and petrochemical applications. At the HTS level, US tariff schedules may distinguish between them at the 10-digit level. Importers should specify the isomer in commercial documentation and confirm the applicable HTS subheading with a licensed customs broker to ensure correct classification.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| INDIA | -- | $188.5M | +$188.5M |
| KOREA, SOUTH | $2.1M | $82.2M | +$80.1M |
| CANADA | $79.1M | $3.1M | -$75.9M |
| CHINA | $41K | $58.7M | +$58.7M |
| MOROCCO | -- | $54.5M | +$54.5M |
Monthly import values over time