6-Amino-1-Naphthol-3-Sulfonic Acid (J Acid) from Mexico
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 — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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