Isotopically pure rare gases having a purity of 99 percent or more by volume
Hydrogen, rare gases and other nonmetals: > Rare gases: > Other > Isotopically pure rare gases having a purity of 99 percent or more by volume
Duty Rate (from China)
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2804.29.00.30
Isotopically Pure Helium-3 Gas
Helium-3 (He-3) is a rare stable isotope of helium with isotopic purity exceeding 99% by volume, classified under HTS 2804.29.0030 as an isotopically pure rare gas. It is used in cryogenic research and neutron detection due to its unique nuclear properties.
Xenon-129 Isotopically Pure Gas
Xenon-129 (Xe-129) gas enriched to 99%+ isotopic purity by volume, falling under HTS 2804.29.0030 for isotopically pure rare gases. Primarily utilized in NMR spectroscopy and medical imaging research.
Neon-20 Isotopically Pure Gas
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.
Argon-36 Isotopically Pure Gas Cylinder
Argon-36 (Ar-36) gas with 99%+ volume isotopic purity, imported in compressed cylinders under HTS 2804.29.0030 for isotopically pure rare gases. Essential for geochronology and stable isotope studies.
Krypton-84 Isotopically Pure Gas
Krypton-84 (Kr-84) isotopically pure to 99%+ by volume, classified under HTS 2804.29.0030 as a rare gas isotope. Applied in laser development and atomic clock calibration.
Helium-3/Helium-4 Hyperpure Mixture
Hyperpure helium mixture with He-3 isotopically enriched to >99% of helium content, meeting HTS 2804.29.0030 for isotopically pure rare gases. Used in dilution refrigerators for ultra-low temperature physics.
Xenon-131 Isotope Gas for MRI
Xenon-131 gas purified to 99%+ isotopic composition by volume under HTS 2804.29.0030 as isotopically pure rare gas. Specialized for hyperpolarized MRI lung imaging applications.