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%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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