2-Naphthylamine-6-sulfonic Acid (Laurent's Acid) from China
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 — China → United States
41.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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)