4-Hydroxycoumarin from United States
4-Hydroxycoumarin is a hydroxylated benzopyrone heterocyclic compound with oxygen hetero-atoms only, aromatic in structure. It is a precursor for anticoagulant drugs, falling under tariff item 2932.99.00 as an 'Other' oxygen heterocycle.
Duty Rate — United States → Canada
0%
Import Tips
• Verify the product is not put up in measured doses for pharmaceutical use, which would shift classification to Chapter 30
• Provide a certificate of analysis showing the chemical purity and absence of added substances