Styrene Sulfonic Acid Sodium Salt from Japan
Sodium styrenesulfonate (CAS 1230-52-2) monomer contains sulfo group on phenylethylene, classified as sulfonated phenol derivative under HTS 2908.99.1500. Used in polymer synthesis for ion exchange resins.
Duty Rate — Japan → United States
15.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Polymerization inhibitor content specification; inhibitor-free grades need stabilization
• Pitfall: Monomer/polymer confusion - provide GPC confirming Mw <500 Da