3914.00.60.00/Purolite C100 Cation Exchange Resin/Mexico

Purolite C100 Cation Exchange Resin from Mexico

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 — Mexico → United States

13.9%

Rate breakdown

9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter

Calculate with your customs value Verify with the Tariff Assistant

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