3,6-Dihydroxy-2,7-naphthalenedisulfonic acid sodium salt from Mexico
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 — Mexico → United States
15.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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