N-Methylperfluorooctane Sulfonamide
N-Methylperfluorooctane sulfonamide (N-MePFOSA) is a separate chemically defined compound used in manufacturing water- and oil-repellent coatings. Its methyl substitution on the sulfonamide nitrogen keeps it within the definition of 'other perfluorooctane sulphonamides' under tariff item 2935.50.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the compound is not a perfluorooctane sulphonamide
Other sulphonamides are classified in the residual subheading.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is not put up in measured doses or for retail sale, as that could shift classification to another heading per Section VI Note 2
• Document the product's use in coatings to confirm it is not a finished formulation
• Verify compliance with Canadian restrictions on perfluorooctane sulfonates and related substances
Related Products under Tariff item 2935.50.00
N-Ethyl-N-(2-hydroxyethyl)perfluorooctane Sulfonamide
N-Ethyl-N-(2-hydroxyethyl)perfluorooctane sulfonamide is a chemically defined organic compound used as a reactive intermediate in the production of fluoropolymers. It contains a perfluorooctane sulfonamide core with an N-ethyl and N-hydroxyethyl substitution, qualifying it as an 'other perfluorooctane sulphonamide' under tariff item 2935.50.00.
N-Ethylperfluorooctane Sulfonamide
N-Ethylperfluorooctane sulfonamide (N-EtPFOSA) is a chemically defined perfluorooctane sulfonamide used as an intermediate in fluorosurfactant synthesis. Its structure, with an ethyl group on the sulfonamide nitrogen, places it squarely within the scope of 'other perfluorooctane sulphonamides' under tariff item 2935.50.00.
N-Ethylperfluorooctane Sulfonamide (EtFOSA)
N-Ethylperfluorooctane sulfonamide (EtFOSA) is a chemically defined perfluorooctane sulfonamide used as a degradation product marker and synthetic intermediate in PFAS research. As a separate chemically defined compound with a perfluorooctane sulfonamide structure, it falls under tariff item 2935.50.00 for 'other perfluorooctane sulphonamides'.
N-Methylperfluorooctane Sulfonamido Ethanol (MeFOSE)
N-Methylperfluorooctane sulfonamido ethanol (MeFOSE) is a key building block for producing fluorochemical polymers used in surface treatments. As a chemically defined perfluorooctane sulfonamide with an N-methyl and hydroxyethyl group, it falls under tariff item 2935.50.00 for 'other perfluorooctane sulphonamides'.
Perfluorooctane Sulfonamide (PFOSA)
Perfluorooctane sulfonamide (PFOSA) is the parent compound of the perfluorooctane sulphonamide family, used in analytical standards and research. As a separate chemically defined compound with a perfluorooctane sulfonamide structure, it falls squarely under tariff item 2935.50.00 for 'other perfluorooctane sulphonamides'.
Perfluorooctane Sulfonamide Potassium Salt
Perfluorooctane sulfonamide potassium salt is the potassium salt form of perfluorooctane sulfonamide, used in aqueous fluorosurfactant formulations. Per Chapter 29 Note 5(C)(1), inorganic salts of organic compounds are classified in the heading appropriate to the organic compound, so this salt falls under tariff item 2935.50.00 as an 'other perfluorooctane sulphonamide'.