Tritium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing tritium or its compounds
Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products: > Radioactive elements and isotopes and compounds other than those of subheading 2844.10, 2844.20 or 2844.30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive residues: > Tritium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing tritium or its compounds
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Products classified under HTS 2844.41.00.00
Tritium Gas Vial
A sealed glass vial containing pure tritium gas (hydrogen-3) used in scientific research and calibration of radiation detectors. It falls under HTS 2844.41.00.00 as a compound of tritium, specifically the elemental isotope in gaseous form. This classification covers radioactive isotopes and their simple compounds.
Tritiated Water (HTO) Solution
Aqueous solution of tritiated water used as a tracer in biological and hydrological studies. Classified under HTS 2844.41.00.00 as a compound of tritium meeting Chapter 28 chemical definition requirements. Its specific radioactivity exceeds natural levels, qualifying as a radioactive compound.
Tritium Luminous Paint
Phosphor-based paint containing tritium gas in micro-vials for self-luminous markings on instruments. This ceramic dispersion qualifies under HTS 2844.41.00.00 as mixtures containing tritium compounds with specific radioactivity >74 Bq/g. Used in aviation and military applications.
GTLS Tritium Keychain Light
Glass tube tritium light source (GTLS) in keychain form providing constant green glow for 10+ years. Falls under HTS 2844.41.00.00 as a dispersion containing tritium gas with glass phosphor. Consumer product leveraging tritium's beta decay for illumination.
Tritium Target for Cyclotron
Metal foil target enriched with tritium for neutron production in particle accelerators. Classified as a tritium compound/alloy under HTS 2844.41.00.00 due to its radioactive content exceeding 74 Bq/g. Essential for medical isotope production.
Tritiated Thymidine (3H-TdR)
Radioactively labeled nucleoside [methyl-3H]thymidine used in DNA synthesis research. As an organic compound of tritium, it qualifies under HTS 2844.41.00.00 per Chapter 28 Note 1 extensions for radioactive isotopes. Supplied in ethanol solution at high specific activity.
Tritium Ceramic Scintillator
Ceramic matrix doped with tritium and scintillator crystals for radiation detection. This cermet-style product falls under HTS 2844.41.00.00 as ceramic products containing tritium compounds. Used in portable Geiger counters.
Self-Luminous Tritium Exit Sign
Emergency exit sign using GTLS tubes for 20-year illumination without electricity. Classified under HTS 2844.41.00.00 as a mixture/dispersion containing tritium with specific radioactivity >74 Bq/g. Meets UL 924 standards.
Tritium Alloy Wire
Titanium-tritide alloy wire used in neutron generators. As an alloy containing tritium compounds, it qualifies under HTS 2844.41.00.00 with activity exceeding Chapter threshold. Hydride form enhances neutron yield.
Tritium Calibration Source
Sealed source containing adsorbed tritium for calibrating beta radiation monitors. Classified as a tritium compound under HTS 2844.41.00.00; NIST-traceable with certificate of activity. Used by health physics departments.