HS Code for PFOSF

Perfluorooctane sulphonyl fluoride (PFOSF) is classified under HS code 2904.36. This substance is a derivative of a hydrocarbon where hydrogen atoms have been replaced by fluorine and a sulphonyl fluoride group (-SO2F) has been attached. It is classified in Chapter 29 as a separate chemically defined organic compound. PFOSF is a critical intermediate in the production of PFOS-related substances and is regulated under the Stockholm Convention. The HS nomenclature provides this specific subheading to ensure that the movement of this precursor is tracked accurately. Its chemical structure as a sulphonyl halide derivative of a perfluorinated hydrocarbon dictates its placement within heading 2904.

Products Included

• Perfluorooctane sulphonyl fluoride
• POSF (Perfluorooctane sulfonyl fluoride)
• 1-Octanesulfonyl fluoride, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-
• Technical grade PFOSF

Common Misclassification

PFOSF is sometimes misclassified under 2904.31 (PFOS acid) or 2904.35 (PFOS salts). While chemically related, the fluoride functional group is distinct from the acid or salt forms. It is also occasionally confused with 2903.39 (other fluorinated derivatives of acyclic hydrocarbons), but because it contains a sulphonyl group, heading 2904 is the correct and more specific classification. Importers must distinguish between the sulfonyl fluoride and the sulfonic acid to avoid customs delays.

FAQ

What is the HS code for PFOSF?

The HS code for perfluorooctane sulphonyl fluoride is 2904.36.

Is PFOSF the same as PFOS acid?

No, PFOSF is a precursor (sulfonyl fluoride) classified under 2904.36, while PFOS acid is classified under 2904.31.