Product classification
HS code for Perfluorooctane sulfonyl fluoride: 2904.36
Derivatives of hydrocarbons, perfluorooctane sulphonyl fluoride, whether or not halogenated.
Classification of perfluorooctane sulfonyl fluoride under HS 2904.36
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is straightforward based on the chemical structure: a hydrocarbon derivative where all hydrogen atoms have been replaced by fluorine and which contains a sulfonyl fluoride functional group.
- Covers
- 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
- Also under 2904.36
- 3M Scotchgard (historical precursor)
- DuPont Zonyl (historical precursor)
- Daikin PFOSF (historical)
Codes often confused with 2904.36
Common mistake. 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.
Top exporters and importers of HS 290436 (the code used for perfluorooctane sulfonyl fluoride), 2025
In 2025, the largest exporter of HS 290436 (the code used for perfluorooctane sulfonyl fluoride) in UN Comtrade data was Latvia, with 46% of world exports; the largest importer in UN Comtrade data was Brazil, with 99% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 290436, not only perfluorooctane sulfonyl fluoride.
Top exporters 2025 · share of world exports
- 1 Latvia $2K 46% of world exports
- 2 Slovakia $2K 42% of world exports
- 3 Germany $626 12% of world exports
World total: $5K Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Brazil $540K 99% of world imports
- 2 India $3K 0.5% of world imports
- 3 Ukraine* ~$2K 0.4% of world imports · partner records ↗
World total: $546K Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for perfluorooctane sulfonyl fluoride
Brazil classifies perfluorooctane sulfonyl fluoride under NCM 2904.36.00: HS 2904.36 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about perfluorooctane sulfonyl fluoride
What is the HS code for Perfluorooctane sulfonyl fluoride?
The HS code for Perfluorooctane sulfonyl fluoride is 290436 (Derivatives of hydrocarbons; perfluorooctane sulphonyl fluoride, whether or not halogenated). The HS code for this specific chemical compound is 2904.36.
How do I classify Perfluorooctane sulfonyl fluoride for customs?
Perfluorooctane sulfonyl fluoride is classified under HS code 290436 — Derivatives of hydrocarbons; perfluorooctane sulphonyl fluoride, whether or not halogenated. This is a 6-digit subheading level code.
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.
Which countries are the top exporters of perfluorooctane sulfonyl fluoride (HS 290436)?
In 2025, the top exporters of HS 290436 (the code used for perfluorooctane sulfonyl fluoride) in UN Comtrade data were Latvia ($2K, 46% of world exports), Slovakia ($2K) and Germany ($626). World exports came to about $5K, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of perfluorooctane sulfonyl fluoride (HS 290436)?
In 2025, the top importers of HS 290436 (the code used for perfluorooctane sulfonyl fluoride) in UN Comtrade data were Brazil ($540K, 99% of world imports), India ($3K) and Ukraine (about $2K). World imports came to about $546K, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Perfluorooctane sulfonyl fluoride the same in all countries?
The base HS code 290436 for Perfluorooctane sulfonyl fluoride is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for perfluorooctane sulfonyl fluoride in Brazil?
In Brazil, perfluorooctane sulfonyl fluoride (HS 290436) is classified under NCM 2904.36.00.