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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If heavily contaminated with inorganic fluorides
Products losing chemical definition as organic compounds due to impurities may shift to inorganic chemical chapters.
If finishing agents for textiles containing APFOS
APFOS in formulated textile finishing preparations classifies under Chapter 38 as chemical goods used in manufacturing.
If for other sulfonated perfluoroalkyl derivatives
Sulfonated/nitrated halogenated hydrocarbons not specifically PFOS fall under the 2904.90 basket.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include assay reports confirming ≥98% purity to avoid reclassification; check for Stockholm Convention restrictions; use UN-approved packaging for corrosive fluorochemicals
Related Products 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).
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.