Thorium Lantern Mantle Residue from Mexico
Waste residues from manufacturing gas lantern mantles impregnated with thorium nitrate, retaining thorium-232 daughters. These are radioactive residues under Chapter 28 Note 4(f), classifiable in tariff item 2844.44.00.
Duty Rate — Mexico → Canada
0%
Import Tips
• Confirm the residue is not a pure thorium compound (2844.30)
• Provide a thorium-232 and daughter nuclide analysis to CBSA
• Obtain a Canadian Nuclear Safety Commission import permit if the activity exceeds thresholds