Helium-3 Research Gas from Mexico
Isotopically separated helium-3 gas (3He) in cryogenic research containers for neutron detection and low-temperature physics. While helium heading exists, rare helium-3 falls under HTS 2804.29.00 as 'other' rare gases due to its scarcity and specialized applications. Supplied at extreme purity levels.
Duty Rate — Mexico → United States
3.7%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Obtain NRC export license documentation from origin country; declare precise isotopic ratio; critical to specify research end-use to avoid nuclear materials scrutiny