Ammonium perfluorooctane sulfonate
Sulfonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated: > Perfluorooctane sulfonic acid, its salts and perfluorooctane sulfonyl fluoride: > Ammonium perfluorooctane sulfonate
Duty Rate (from China)
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
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 2904.32.00.00
Ammonium Perfluorooctane Sulfonate (APFOS) Powder
Pure ammonium perfluorooctane sulfonate (APFOS) in powdered form, a fluorinated surfactant classified under HTS 2904.32.00.00 as a sulfonated, halogenated derivative of hydrocarbons. It is chemically defined as the ammonium salt of perfluorooctane sulfonic acid, meeting Chapter 29 note (a).
Technical Grade Ammonium Perfluorooctane Sulfonate 98%
Technical grade APFOS at 98% purity with minor impurities, still classified as a separate chemically defined organic compound under HTS 2904.32.00.00 per Chapter 29 note (a). Used in industrial wetting agent formulations as a perfluorosulfonate salt.
APFOS Stabilized Flake Form
Ammonium perfluorooctane sulfonate flakes with added stabilizer for safe transport, classified under HTS 2904.32.00.00 per Chapter 29 note (f). The stabilizer preserves the pure compound without altering its primary chemical identity as a perfluorosulfonate salt.
High Purity APFOS for Firefighting Foam Production
Ultra-high purity ammonium perfluorooctane sulfonate specifically for AFFF concentrate production, under HTS 2904.32.00.00 as a chemically defined fluorosulfonate. End-use as firefighting surfactant does not affect pure compound classification.
Ammonium Perfluorooctane Sulfonate Aqueous Solution 50%
50% APFOS dissolved in water, classified under HTS 2904.32.00.00 per Chapter 29 note (d) for chemically defined organic compounds in aqueous solution. The water serves as solvent without specific use adaptation.
APFOS Anti-Dusting Granules
Granular ammonium perfluorooctane sulfonate with anti-dusting agent for handling safety, under HTS 2904.32.00.00 per Chapter 29 note (g). Addition facilitates identification without specific use suitability.