Tetrahydrofuran Stabilized from China
Tetrahydrofuran (THF) is a five-membered heterocyclic ring with one oxygen hetero-atom, essential solvent for Grignard reactions and polymer processing. Stabilized grade contains BHT to prevent peroxide formation during transport, qualifying under Chapter 29 note 2(f). Classified at 2932.99.90.90 as other oxygen heterocyclic compounds.
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
• Stabilizer must be <0.025% BHT; higher concentrations trigger 3824 reclassification
• Peroxide test certificates required for all THF imports regardless of stabilization
• DOT shipping papers must specify 'stabilized THF UN2924' for proper hazmat handling