Tritium Gas (HT)
Tritium gas (HT) is the radioactive isotope of hydrogen, used in nuclear research, fusion experiments, and as a tracer in scientific studies. It falls under tariff item 2845.90.00 because it is an isotope other than those of heading 28.44, and its compounds, whether inorganic or organic, are classified here.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is heavy water (deuterium oxide) rather than tritium gas
Heavy water is a distinct isotope compound classified under a different subheading of 2845.
If the tritium gas is put up in a mixture with other chemicals for a specific industrial use
Mixtures not elsewhere specified may fall under chapter 38, but this is unlikely for pure tritium gas.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure you have the necessary Canadian Nuclear Safety Commission (CNSC) import permit for radioactive materials before shipping
• Declare the product accurately as an isotope of hydrogen under 2845.90.00 to avoid delays
• Verify if the shipment qualifies for any duty relief programs for scientific or research use
Related Products under Tariff item 2845.90.00
Argon-38 Enriched Gas
Argon-38 is a stable isotope of argon, enriched for use in geological age dating and tracer studies. It is a separate chemical element that is not radioactive, so it does not fall under heading 28.44. This tariff item covers isotopes other than those of heading 28.44 and their compounds.
Carbon-14 Labeled Urea
Carbon-14 labeled urea is an organic compound of the radioactive isotope carbon-14, used in biochemical tracer studies and radiometric dating. Although carbon-14 is radioactive, it is not one of the specific elements listed in heading 28.44 (technetium, promethium, polonium, or elements with atomic number greater than 84). Therefore, it falls under this tariff item for isotopes other than those of heading 28.44.
Deuterium Oxide (Heavy Water, D2O)
Deuterium oxide, also known as heavy water, is a compound of the stable hydrogen isotope deuterium. It is used as a moderator in nuclear reactors and in various scientific applications. Since deuterium is not a radioactive isotope, it is excluded from heading 28.44 and falls under this tariff item for compounds of isotopes other than those of heading 28.44.
Helium-3 Gas
Helium-3 is a rare stable isotope of helium, used in cryogenics, neutron detection, and quantum computing. It is not a radioactive isotope, so it is not classified in heading 28.44. This tariff item covers isotopes other than those of heading 28.44, including helium-3.
Krypton-86 Gas Standard
Krypton-86 is a stable isotope of krypton, used as a wavelength standard in laser metrology and spectroscopy. It is not radioactive and therefore not classified under heading 28.44. This tariff item covers isotopes other than those of heading 28.44.
Lead-208 Enriched Target
Lead-208 enriched target is a stable isotope of lead, used in nuclear physics experiments and isotope production. It is not radioactive and does not fall under heading 28.44. This tariff item covers isotopes other than those of heading 28.44.