Warfarin Sodium Precursor (4-Hydroxycoumarin Base) from China
4-Hydroxycoumarin base is used to synthesize warfarin sodium, a pharmaceutical anticoagulant. It has a specific aromatic lactone structure. As a separate chemically defined organic compound, it falls under tariff item 2932.20.00 for lactones.
Duty Rate — China → Canada
0%
Import Tips
• Ensure the 4-hydroxycoumarin is a pure intermediate, not a formulated product
• If it is used as a pharmaceutical intermediate, it may still be classified under this tariff item
• Provide the CAS number and purity certificate to the CBSA for classification support