Tetrahydrofuran (THF) ACS Grade from China
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 — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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