4-Hydroxy-1-naphthalenesulfonic acid, 98% purity from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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