Fluorosulfonated Polymer Powder (for Membranes) from United States
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.
Duty Rate — United States → Canada
Import Tips
• 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