Stibine Gas from Mexico
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 — Mexico → United States
14.2%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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