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

3.9%

Rate breakdown

9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter

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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