1-Naphthylamine-5-sulfonic Acid (Laurent's Acid) from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, 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