Inhibited Styrene Monomer from Mexico
Inhibited styrene monomer contains 10-15 ppm of tert-butylcatechol (TBC) as a polymerization stabilizer, added to ensure stability during storage and transport. The stabilizer is necessary for preservation and does not alter the product's general use, so it remains a separate chemically defined organic compound under tariff item 2902.50.00. This aligns with Chapter 29 note 1(f) allowing added stabilizers.
Duty Rate — Mexico → Canada
Import Tips
• Provide documentation that the TBC stabilizer is solely for preservation and does not enhance specific use, to support classification under 2902.50.00
• Check if the stabilizer concentration meets Canadian transportation regulations for dangerous goods
• Ensure the importer has a valid import permit if the styrene is subject to chemical control lists