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
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 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