Hexachlorocyclobutadiene from Germany
Hexachlorocyclobutadiene is a highly reactive four-membered ring with alternating double bonds and chlorines. HTS 2903.89.70 captures this as halogenated cyclenic hydrocarbon due to its conjugated diene system. Used as Diels-Alder dienophile in polymer chemistry.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Ship as stabilized complex (Fe or Ni) to prevent dimerization
• Use Schlenk techniques for moisture-free transfer
• Document <1% dimer content for purity classification