3,5-Naphthalenedisulfonic Acid from China
While not explicitly named, 3,5-naphthalenedisulfonic acid falls under HTS 2904.10.10.00 as a naphthalene derivative containing only sulfo groups, consistent with the heading's scope for disulfonic acids. Used in dye coupling and surfactant production.
Duty Rate — China → United States
40.5%
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
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)
Import Tips
• Position isomer documentation critical; 1,5 vs 3,5 affects reactivity but same tariff
• pH adjustment documentation needed for acid vs salt forms during customs valuation
• Avoid bulk packaging over 25kg drums to prevent corrosion classification issues