Purolite C100 Cation Exchange Resin from Canada
Purolite C100 is a strong acid cation exchange resin based on polystyrene-divinylbenzene copolymer (from heading 3903), in primary bead form, used for water softening by exchanging calcium and magnesium ions. It falls under HTS 3914.00.60.00 as an ion-exchanger derived from polymers of headings 3901-3913, classified as 'Other' since it's not specifically named elsewhere. The polymer meets the 95% monomer content rule for polystyrene.
Duty Rate — Canada → United States
Rate breakdown
Import Tips
• Verify polymer composition documentation to confirm it derives from headings 3901-3913 and meets 95% monomer threshold; obtain supplier certificates for ion-exchange capacity
• Common pitfall: misclassifying as unfinished polymer under 3903 if not functionalized for ion-exchange
• Ensure MSDS for hazardous material handling during customs