HS Code for Potassium PFOS

Potassium perfluorooctane sulphonate (Potassium PFOS) is classified under HS code 2904.34. This classification falls within Chapter 29, which covers organic chemicals, and specifically under the heading for sulfonated, nitrated, or nitrosated derivatives of hydrocarbons. Potassium PFOS is a perfluorinated anionic surfactant and is recognized as a persistent organic pollutant (POP). The specific subheading 2904.34 was established to monitor and control the international trade of this substance in accordance with environmental treaties like the Stockholm Convention. Classification is determined by its chemical structure as a salt of perfluorooctane sulfonic acid. Under the General Rules of Interpretation (GRI) 1 and 6, the product is identified by its specific chemical identity as a sulfonated derivative where the hydrogen atoms of the hydrocarbon chain have been replaced by fluorine atoms, and the acid group is neutralized with potassium.

Products Included

• Potassium perfluorooctane sulfonate (technical grade)
• Heptadecafluorooctane-1-sulfonic acid potassium salt
• PFOS-K chemical reagents
• Potassium salts of perfluorooctane sulfonic acid for industrial use

Common Misclassification

Potassium PFOS is frequently misclassified under HS code 3824.99, which covers miscellaneous chemical products and preparations. This occurs when the substance is part of a mixture or a prepared surfactant solution. However, if the product is a separate chemically defined compound, Chapter 29 takes precedence. Another common error is using HS code 2904.31, which is reserved for perfluorooctane sulfonic acid itself, rather than its potassium salt. It is also sometimes confused with other fluorinated hydrocarbons under 2903.39, but the presence of the sulfonic acid group necessitates classification in 2904.

FAQ

What is the HS code for Potassium PFOS?

The specific HS code for Potassium perfluorooctane sulphonate is 2904.34.

Is Potassium PFOS subject to international trade restrictions?

Yes, because it is listed under the Stockholm Convention on Persistent Organic Pollutants, many countries require specific import/export permits and reporting for this HS code to ensure it is only used for acceptable purposes or specific exemptions.