4-Hydroxy-1-naphthalenesulfonic acid, 98% purity from Mexico
High-purity technical grade 1-Naphthol-4-sulfonic acid for pharmaceutical and dye intermediates. Qualifies under HTS 2908.99.06.00 as a separate chemically defined compound with only sulfo groups, per Chapter 29 scope.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide CoA with purity >95% to affirm 'chemically defined' status
• Segregate from impurities that could invoke Chapter 38 mixtures
• Comply with TSCA registration for US import