Fluorosulfonated Polymer Powder (for Membranes)
Fluorosulfonated polymer powder is a fluoropolymer in primary form, chemically modified with sulfonyl groups for use in ion-exchange membranes. It falls under tariff item 3904.69.00 as 'Other' fluoropolymers because the chemical modification places it in the 'Other' subheading per subheading note 1(a)(3), as it is not more specifically covered elsewhere. The powder form is a primary form as defined in chapter note 6, suitable for further processing into membranes.
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 |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the powder is processed into plates, sheets, or film for membrane use
Once converted into a membrane form, it would be classified under plates, sheets, and other articles of plastics.
If the polymer is a silicone-based fluoropolymer
Silicones in primary forms are classified under heading 39.10, not as fluoropolymers.
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
• Classify the powder as a chemically modified fluoropolymer; keep documentation of the modification process for CBSA review
• Confirm the powder is not a solution or dispersion, as those may fall under other headings
• Check if the end-use as membrane material triggers any special permits, such as those under the Canadian Environmental Protection Act
Related Products under Tariff item 3904.69.00
Chlorinated Fluoropolymer Concentrate Pellets
These pellets are a chlorinated olefin fluoropolymer concentrate for extrusion applications, with a polymer content compliant with the 95% rule for fluoropolymers. They are supplied in primary forms and are not otherwise specified in the subheading. As a fluoropolymer in primary forms, they fall under tariff item 3904.69.00.
Dyneon FC 2210Z Fluoroelastomer
Dyneon FC 2210Z is a bisphenol-curable fluoroelastomer supplied as primary pellets, with a vinylidene fluoride/hexafluoropropylene copolymer content exceeding 95% by weight. It is designed for low-temperature flexible seals in aerospace applications. As a fluoropolymer in primary forms not elsewhere specified, it falls under tariff item 3904.69.00.
Ethylene Chlorotrifluoroethylene Copolymer (ECTFE)
ECTFE is a copolymer fluoropolymer primarily composed of chlorotrifluoroethylene and ethylene, with comonomer units meeting the 95% content requirement. It is supplied in primary forms such as pellets or powder for various applications. As a fluoropolymer in primary forms not elsewhere specified, it is classified under tariff item 3904.69.00.
Fluorel Elastomer FC-2182
Fluorel FC-2182 is a perfluoroelastomer gum stock with perfluoromethyl vinyl ether and tetrafluoroethylene as the primary monomer units, exceeding 95% by weight. It is supplied in raw gum form for compounding into seals requiring extreme chemical resistance. This elastomeric fluoropolymer in primary forms is classified under tariff item 3904.69.00.
Fluorinated Ethylene Propylene Special Copolymer
Fluorinated Ethylene Propylene (FEP) special copolymer pellets are a type of fluoropolymer in primary forms, produced by copolymerizing tetrafluoroethylene and hexafluoropropylene. They are classified under tariff item 3904.69.00 as 'Other' fluoropolymers because the copolymer does not meet the 95% monomer content threshold for named subheadings, and no single comonomer unit predominates sufficiently to merit a more specific classification. These pellets are used in applications requiring high chemical resistance and thermal stability, such as wire insulation and chemical processing equipment.
Kalrez Perfluoroelastomer 6375
Kalrez 6375 is a perfluoroelastomer (FFKM) composed of tetrafluoroethylene, perfluoromethyl vinyl ether, and a cure-site monomer, with the polymer content exceeding 95% by weight. It is supplied in gum form for compounding into O-rings for chemical process industries. As an elastomeric fluoropolymer in primary forms, it falls under tariff item 3904.69.00.