2(3H)-Furanone Dihydro from Canada
Dihydro-2(3H)-furanone (gamma-butyrolactone alternative name) is a five-membered lactone oxygen heterocycle under HTS 2932.99.70.00. Pharmaceutical intermediate and solvent.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
• Pharma intermediate; Drug Master File (DMF) reference recommended
• Lactone ring opening sensitivity; purity >99.5% typically required
• Controlled precursor monitoring for some applications