Diphenylthiourea from Mexico
Diphenylthiourea is an aromatic thiourea derivative (C6H5-NH-CS-NH-C6H5) used as a vulcanization accelerator in rubber production and as a reagent in organic synthesis. It is a separate chemically defined organic compound containing sulphur directly linked to carbon, which places it in heading 29.30. As an organo-sulphur compound not more specifically described elsewhere, it falls under tariff item 2930.90.00.
Duty Rate — Mexico → Canada
Import Tips
• Ensure the product is a separate chemically defined compound; if it contains impurities, confirm they are incidental to the manufacturing process
• Have the chemical formula and CAS number ready for the CBSA officer
• Check if the product requires a permit under the Chemical Weapons Convention or other controlled substances regulations