HFC-23 Calibration Gas Standard from Mexico
A NIST-traceable calibration gas standard containing known concentrations of trifluoromethane (HFC-23) in a balance gas, used for calibrating greenhouse gas monitoring equipment. This mixture falls under tariff item 3827.59.00 as it contains HFC-23, a halogenated derivative of methane, and does not contain CFCs or HCFCs. It is not a separate chemically defined compound, but a mixture, and is not excluded by Chapter 38 notes.
Duty Rate — Mexico → Canada
Import Tips
• Ensure the mixture is accompanied by a certificate of analysis or specification sheet to confirm HFC-23 content and absence of CFCs/HCFCs
• Declare the product under tariff item 3827.59.00 and be prepared to provide technical documentation to the CBSA if requested
• Verify if the gas mixture requires any import permits under Canada's Ozone-Depleting Substances Regulations, as HFCs are controlled substances