Duty Rate (from China)
Subheadings
Products classified under Tariff item 2804.29.00
Argon-38 Calibration Gas
Argon-38 calibration gas is a stable isotope of argon, a rare gas, mixed at trace levels in a 1-liter cylinder for mass spectrometry calibration. It qualifies as a separate chemical element under Chapter 28, as it is not a radioactive isotope and falls under the 'other' rare gases category.
Argon Gas for Welding
High-purity argon gas for welding is a rare gas in elemental form, used as an inert shielding atmosphere in MIG/TIG welding. It falls under tariff item 2804.29.00 as 'other' rare gases, distinct from hydrogen and helium.
Helium-3 Research Gas
Helium-3 research gas is an isotopically separated rare gas used in neutron detection and low-temperature physics. Although helium has a specific subheading, helium-3 is classified under 'other' rare gases because it is an isotope not covered by the standard helium subheading.
Helium for Airship Inflation
Aviation-grade helium for airship inflation is a rare gas in elemental form, used for lift. It falls under tariff item 2804.29.00 as 'other' rare gases, as helium is not separately classified in this subheading.
Helium Gas Cylinder
Compressed helium gas for balloons and industrial use is a rare gas in elemental form. It falls under tariff item 2804.29.00 as 'other' rare gases, distinct from hydrogen.
Helium Neon Laser Gas Mixture
Helium-neon laser gas mixture is a mixture of rare gases, with helium as the primary component. It falls under tariff item 2804.29.00 as 'other' rare gases, provided the mixture is not classified elsewhere.
High-Purity Helium for MRI Machines
Ultra-pure helium for MRI machines is a rare gas in elemental form, used for cooling superconducting magnets. It falls under tariff item 2804.29.00 as 'other' rare gases.
Industrial Welding Helium Shielding Gas
Pure helium cylinders for welding shielding gas are a rare gas in elemental form. They fall under tariff item 2804.29.00 as 'other' rare gases, distinct from hydrogen.
Krypton-85 Industrial Tracer
Krypton-85 industrial tracer is a low-activity radioactive isotope of krypton used for leak detection. It is classified under 'other' rare gases, but only if its radioactivity is below the threshold for heading 28.44; otherwise, it falls under radioactive isotopes.
Krypton Gas Laboratory Grade
Ultra-high purity krypton gas in glass ampoules is a rare gas used for spectroscopy and research. It is a separate chemical element, not a mixture, and falls under tariff item 2804.29.00 as 'other' rare gases.
Neon-20 Research Isotope
Neon-20 research isotope is a stable isotope of neon, a rare gas, enriched for nuclear physics research. It is classified under 'other' rare gases as it is not a radioactive isotope and is a separate chemical element.
Neon Gas Cylinder
Compressed neon gas for signage and lighting is a rare gas in elemental form. It falls under tariff item 2804.29.00 as 'other' rare gases, distinct from hydrogen and helium.
Radon Gas Calibration Standard
Radon-222 calibration gas is a radioactive isotope of radon, a rare gas, used in environmental monitoring. It is classified under 'other' rare gases only if its radioactivity is below the threshold; otherwise, it falls under radioactive isotopes.
Xenon-129 MRI Contrast Gas
Hyper-polarized xenon-129 gas for MRI is a rare gas isotope used in medical imaging research. It is a separate chemical element, not a mixture, and falls under tariff item 2804.29.00 as 'other' rare gases.
Xenon Gas for Lighting
Purified xenon gas for lighting is a rare gas in elemental form, used in xenon arc lamps. It falls under tariff item 2804.29.00 as 'other' rare gases, distinct from helium and neon.