Fluorochemical Surfactant Building Block N-EtFOSE from China
N-EtFOSE is a fluorinated sulfonamide used as an intermediate in producing water- and oil-repellent coatings. It precisely matches HTS 2935.30.00.00 for N-Ethyl-N-(2-hydroxyethyl)perfluorooctane sulfonamide, a separate chemically defined compound under Chapter 29. The perfluoro chain and hydroxyethyl group characterize its sulfonamide classification.
Duty Rate — China → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Include NMR or HPLC data in documentation to prove structural identity; comply with REACH or EPA PFAS reporting if >100 lbs imported; label as 'research chemical' if for lab use to avoid end-use scrutiny