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2901.10.10.00/Ultra-High Purity Butane (99.999%)/Mexico

Ultra-High Purity Butane (99.999%) from Mexico

N-butane (C4H10) at 99.999% purity for semiconductor manufacturing and calibration gas standards. Pure saturated acyclic hydrocarbon under HTS 2901.10.10.00 per Chapter 29 definitions. Supplied in specialty gas cylinders.

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

• Include analytical certificate showing >99% purity; use proper UN1011 labeling; declare research/industrial use to prevent fuel classification