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
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Polymerization inhibitor content specification; inhibitor-free grades need stabilization
• Pitfall: Monomer/polymer confusion - provide GPC confirming Mw <500 Da