6-Amino-1-naphthol-3-sulfonic acid (J Acid) from Japan
J Acid (6-Amino-1-naphthol-3-sulfonic acid) and its salts are specifically enumerated under HTS 2922.21.1000 as essential intermediates for direct and reactive dyes used in cellulosic fibers. The compound's ortho amino-hydroxy positioning enables stable azo coupling. Typically imported as 92-98% purity technical grade.
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
• HPLC chromatogram required to distinguish J Acid from isomeric naphthol acids
• pH stability testing prevents decomposition claims during ocean transit
• Confirm <0.1% heavy metals to meet REACH and TSCA impurity standards