2903.59.90.00/Perfluoroisobutene (PFIB)/Japan

Perfluoroisobutene (PFIB) from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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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)