Neon-20 Isotopically Pure Gas from Mexico
Neon-20 (Ne-20) enriched to greater than 99% isotopic purity by volume, classified in HTS 2804.29.0030 as isotopically pure rare gases. Used in precision mass spectrometry and nuclear physics experiments.
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
• Submit third-party lab analysis proving Ne-20 >99% purity during customs entry
• Use UN-approved gas cylinders; include pressure test certificates in documentation
• Distinguish from lighting neon (2804.40) by declaring scientific/research end-use