6-Amino-1-Naphthol-3-Sulfonic Acid (J Acid) from Germany
J Acid contains amino group on naphthalene making it a naphthylamine derivative despite hydroxy substituent. Classifies HTS 2921.45.90 as 'other' aromatic monoamine derivative. Oxygen function secondary to nitrogen-function per Chapter 29 rules.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Highly reactive; must ship with stabilizer per chapter note (f)
• Distinguish from Gamma acid (8-isomer); CAS 89-63-4 specific
• Oxidation sensitivity requires nitrogen blanketing in packaging