Potassium Perfluorooctane Sulfonate
Potassium salt of perfluorooctane sulfonic acid, a chemically defined organic compound with sulfonate functionality. Classified under HTS 2904.31.00.00 per Chapter 29 note on inorganic salts of organic acids staying with the parent compound. Used in specialty chemical manufacturing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily by potassium salt nature
Other potassium salts might fall under Chapter 28, but Chapter 29 note C(1) prioritizes organic component.
If sulfur atom linkage interpreted as organo-sulfur
Organo-sulfur compounds in 2930, but sulfonated derivatives specifically directed to 2904.
If formulated as finishing agent for textiles
PFOS-based finishing agents classified by end-use in Chapter 38 rather than pure chemical.
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Import Tips & Compliance
• Provide salt composition analysis and confirm organic acid parent structure for classification
• Check Stockholm Convention import bans; many countries restrict PFOS salts entirely
• Label with GHS hazard pictograms for corrosive and aquatic toxicity hazards
Related Products under HTS 2904.31.00.00
Perfluorooctane Sulfonic Acid (PFOS)
Perfluorooctane sulfonic acid (PFOS) is a fully fluorinated organic compound with a sulfonate group, classified under HTS 2904.31.00.00 as a sulfonated, halogenated derivative of hydrocarbons. It is used in chemical synthesis and industrial applications, meeting Chapter 29 note (a) for separate chemically defined organic compounds.
Lithium Perfluorooctane Sulfonate
Lithium salt form of PFOS, recognized as the same chemically defined compound under HTS 2904.31.00.00. The sulfonated perfluorocarbon structure dominates classification per Chapter 29 salt rules. Applied in electrochemical and surfactant formulations.
Perfluorooctane Sulfonyl Fluoride (POSF)
Perfluorooctane sulfonyl fluoride (POSF), the acid fluoride derivative of PFOS, explicitly covered under HTS 2904.31.00.00. This reactive fluorochemical intermediate fits Chapter 29 as a halogenated, sulfonated hydrocarbon derivative.
Ammonium Perfluorooctane Sulfonate
Ammonium salt of perfluorooctane sulfonic acid, classified identically to the acid under HTS 2904.31.00.00 per Chapter 29 salt classification rules. Commonly used in fire-fighting foams and coatings.
Diethanolamine Perfluorooctane Sulfonate
Organic salt formed between diethanolamine and PFOS, classified with the later-occurring sulfonated acid per Chapter 29 note on salts (C)(2). Falls under HTS 2904.31.00.00 as the PFOS component dominates.
PFOS Stabilized with Triethanolamine
Perfluorooctane sulfonic acid with triethanolamine stabilizer added for preservation, permitted under Chapter 29 note (f). Remains classified in HTS 2904.31.00.00 as the stabilizer doesn't change primary character.