2(3H)-Furanone Dihydro from Mexico
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 — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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