N-Ethylperfluorooctane Sulfonamide (EtFOSA) from Japan
EtFOSA serves as a degradation product marker and synthetic intermediate in PFAS research. Meets HTS 2935.50.00.00 criteria as a separate, chemically defined perfluorooctane sulfonamide.
Duty Rate — Japan → United States
21%
Rate breakdown
9903.04.628.5%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide isotope dilution mass spec data for trace analysis grade material
• Segregate from flammable solvents during transport
• Declare <0.1% PFOA impurities per EPA method 533