Perfluoroisobutene (PFIB) from Germany
Perfluoroisobutene used as chemical intermediate despite high toxicity requiring special handling. HTS 2903.59.90.00 classification as branched unsaturated fluorinated acyclic hydrocarbon. Chapter 29 note (g) permits safety identification additives.
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
• Require DEA Schedule 1 chemical controls and end-user verification
• Use specialized PFIB-rated regulators with fluoropolymer diaphragms
• Include LC50 mammalian inhalation toxicity data (<0.02 ppm/4h)