Helium-3/Helium-4 Mixture (Dilution Grade) from Mexico
> Helium-3/Helium-4 mixture (dilution grade) is a pre-mixed solution with 3-10% helium-3 concentration, used in dilution refrigerator stills. The isotopic content qualifies as enriched helium isotopes under tariff item 2845.40.00. It is used directly in cryostats for phase separation and cooling.
Duty Rate — Mexico → Canada
0%
Import Tips
• > Clearly state the isotopic composition and concentration on the commercial invoice
• Ensure the mixture is classified as an isotope compound, not a natural gas mixture
• Verify that the product meets Canadian safety standards for pressurized gases and obtain any required permits