N-Ethylperfluorooctane Sulfonamide from Japan
N-Ethylperfluorooctane sulfonamide (N-EtPFOSA) is a chemically defined perfluorooctane sulfonamide used primarily as an intermediate in the synthesis of fluorosurfactants. It falls under HTS 2935.50.00.00 as it is specifically listed among other perfluorooctane sulfonamides, which are organo-sulfur compounds with the characteristic sulfonamide group.
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 detailed chemical analysis certificates confirming perfluorooctane sulfonamide structure to avoid misclassification under general sulfonamides
• Include safety data sheets (SDS) highlighting PFAS properties due to strict environmental import regulations
• Verify stabilizer content does not exceed chapter note limits to prevent reclassification as formulated mixtures