Tetrahydrofuran (THF) from Mexico
Tetrahydrofuran is a five-membered heterocyclic ether with one oxygen atom, classified in HTS 2932.99.61.00 per additional U.S. note 3 to section VI. Widely used as a solvent in Grignard reactions and polymer synthesis.
Duty Rate — Mexico → 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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Classify as UN1993 flammable liquid for proper shipping documentation
• Maintain stabilizer certificates as THF forms peroxides upon storage
• Comply with peroxide former handling regulations during import