1-Naphthylamine-5-sulfonic Acid (Laurent's Acid) from Japan
Laurent's acid, a monosulfonated 1-naphthylamine derivative, is classified under HTS 2921.45.60.00 as specified in additional U.S. note 3. Used in manufacturing of acid dyes for wool and silk.
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
• Include batch-specific chromatograms confirming >98% purity
• Comply with EPA chemical import notification requirements
• Declare as 'not for medicinal use' to avoid pharmaceutical chapter confusion