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%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include analytical certificate showing >99% purity; use proper UN1011 labeling; declare research/industrial use to prevent fuel classification