Lithium Perfluorooctane Sulfonate from Mexico
Lithium perfluorooctane sulfonate is the lithium salt of perfluorooctane sulfonic acid (PFOS), a fully fluorinated organic compound with a sulfonate group. It falls under HTS 2904.35.00.00 as one of the 'other salts' of PFOS, distinct from the acid itself or its sulfonyl fluoride, per chapter 29 rules for sulfonated halogenated hydrocarbons.
Duty Rate — Mexico → United States
13.7%
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
Import Tips
• Verify PFOS content and obtain EPA approvals due to restrictions under TSCA and Stockholm Convention on persistent organic pollutants
• Provide detailed chemical analysis certificates confirming it's a PFOS salt, not the acid or fluoride form
• Avoid misclassification as mixtures; ensure purity meets chapter note (a) for separate chemically defined compounds