4-Hydroxycoumarin from Canada
4-Hydroxycoumarin, a hydroxylated benzopyrone heterocyclic with oxygen hetero-atoms only, aromatic. Falls under HTS 2932.99.35.00 as other specified aromatic oxygen-heterocyclics matching chapter scope. Precursor for anticoagulant synthesis.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Strict DEA watch-list monitoring for warfarin precursors; extra documentation needed
• Verify no anticoagulant activity claims to avoid 2937 hormone classification