Sodium 7-Nitronaphth[1,2]oxadiazole-5-sulfonate from Mexico
The sodium salt form of 7-nitronaphth[1,2]oxadiazole-5-sulfonic acid, explicitly covered by HTS 2934.99.06.00. This water-soluble salt maintains the core heterocyclic structure with sulfonate functionality, used in aqueous dye coupling processes and as a reagent in organic synthesis.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Include salt formation verification via NMR spectroscopy in documentation
• Check for water content as excessive hydration might affect classification purity requirements
• Confirm counterion is sodium only; other metal salts may require different subheadings