3,6-Dihydroxy-2,7-naphthalenedisulfonic acid sodium salt from China
The sodium salt form of this specific naphthalenedisulfonic acid, directly listed under HTS 2908.99.0300 for sulfonated phenol derivatives containing only sulfo groups. As a salt of an organic sulfo acid, it classifies with the parent acid per chapter note 3(C)(1). Commonly used in textile dye manufacturing.
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
• Include assay certificate showing sodium content and confirming salt formation with the organic acid base
• Ensure packaging prevents moisture absorption, as deliquescent salts may require special declarations
• Label with GHS hazard pictograms and UN number if applicable for dangerous goods transport