Stibine Gas from Canada
Stibine (SbH3) is an extremely toxic, unstable gas used in trace analysis. As a hydride of nonmetal antimony, it enters HTS 2811.19.61 under other inorganic acids, per Chapter definitions excluding organometallics. Rare industrial use.
Duty Rate — Canada → United States
14.2%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Import certifications limited to labs with fume hood protocols
• Verify generator-produced vs. pure gas for classification
• Coordinate with CDC for select agent oversight