2-Naphthylamine-6-sulfonic Acid (Laurent's Acid) from Mexico
Laurent's acid, a derivative of 2-naphthylamine (β-naphthylamine), is used in acid dye synthesis. It is classified under HTS 2921.45.90.90 as an 'other' derivative within the naphthylamine subheading. The aromatic amine-function remains the principal characteristic for tariff purposes.
Duty Rate — Mexico → United States
16.5%
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
• Distinguish from 1-naphthylamine isomers via melting point data (CAS 92-29-5)
• Ship in neutral drums; acidic conditions may form salts requiring different suffix
• Monitor for carcinogenic impurities (β-naphthylamine <1ppm per OSHA standards)