Tetrahydrofuran (THF) ACS Grade from Mexico
Tetrahydrofuran (THF) is a five-membered heterocyclic ring containing one oxygen hetero-atom, used as solvent in Grignard reactions. HTS 2932.99.90 covers this as other oxygen heterocyclic not specified elsewhere. ACS grade ensures high purity meeting chemically defined compound criteria.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
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
• ACS certification mandatory; provides analytical data confirming >99.9% purity for Chapter 29 classification
• Peroxide inhibitor (BHT) must be declared as stabilizer only; excess levels trigger note (g) exclusion