HS Code for Perfluorooctane sulfonyl fluoride

Perfluorooctane sulfonyl fluoride (POSF) is classified under HS code 2904.36. This classification is situated within Chapter 29, which encompasses organic chemicals. Specifically, heading 2904 covers sulfonated, nitrated, or nitrosated derivatives of hydrocarbons, whether or not halogenated. POSF is a perfluorinated compound that serves as a critical intermediate in the production of various PFOS-related substances. Under the Harmonized System, chemically defined organic compounds are generally classified in Chapter 29. The creation of subheading 2904.36 is a result of international efforts to track the movement of substances regulated under the Stockholm Convention. Unlike mixtures, which are classified in Chapter 38, this code is dedicated to the pure chemical compound or its commercially pure forms. The classification is straightforward based on the chemical structure: a hydrocarbon derivative where all hydrogen atoms have been replaced by fluorine and which contains a sulfonyl fluoride functional group.

Products Included

• Pure perfluorooctane sulfonyl fluoride (POSF)
• Commercially pure POSF used as a chemical intermediate
• POSF intended for the synthesis of perfluorinated surfactants
• Technical grade perfluorooctane sulfonyl fluoride

Common Misclassification

POSF is often confused with 2904.31, which is the code for perfluorooctane sulfonic acid itself. While chemically related, the fluoride derivative is distinct. It is also frequently misclassified under 3824.87 if the importer assumes it is a mixture; however, if the product is a single chemically defined compound, Chapter 29 must be used. Furthermore, it may be confused with other fluorinated hydrocarbons in 2903, but the presence of the sulfonyl fluoride group necessitates classification in 2904.

FAQ

What is the HS code for Perfluorooctane sulfonyl fluoride?

The HS code for this specific chemical compound is 2904.36.

Why is POSF classified separately from other fluorinated chemicals?

It is classified separately to comply with international environmental monitoring requirements for persistent organic pollutants, ensuring that its trade is transparent and regulated according to global safety standards.