2904.31.00.00/Perfluorooctane Sulfonyl Fluoride (POSF)/Japan

Perfluorooctane Sulfonyl Fluoride (POSF) from Japan

Perfluorooctane sulfonyl fluoride (POSF), the acid fluoride derivative of PFOS, explicitly covered under HTS 2904.31.00.00. This reactive fluorochemical intermediate fits Chapter 29 as a halogenated, sulfonated hydrocarbon derivative.

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 DOT/ADR Class 8 corrosive labeling and UN 1779 shipping designation

• Submit TSCA pre-manufacture notice if first US import of this substance

• Confirm no anti-dusting agents added that trigger Chapter 29 note (g) reclassification