Dinonylnaphthalene Sulfonic Acid from China
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 — China → United States
43%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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