Dinonylnaphthalene Sulfonic Acid from Mexico
Dinonylnaphthalene sulfonic acid serves as extractant in hydrometallurgy and lube oil additives. Sulfonated phenolic derivative containing only sulfo groups, classified HTS 2908.99.1500 when >90% pure.
Duty Rate — Mexico → United States
15.5%
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
• Acid number 95-105 mg KOH/g specification; stable >6 months certification
• Pitfall: Solvent-dissolved forms (50% in kerosene) reclassified to Chapter 38