5-Amino-2-naphthalenesulfonic acid (Laurent's Acid) from Canada
Laurent's acid, or 5-Amino-2-naphthalenesulfonic acid, is an aromatic monoamine and its derivatives used as a key diazo component in reactive and direct dyes. It is explicitly listed under HTS 2921.45.10.00 within the naphthalene amine derivatives category. The compound's amino and sulfonic groups on the naphthalene ring define its classification in Chapter 29 for separate chemically defined organic compounds.
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
• Provide IUPAC name and CAS (99-09-2) on commercial invoice to match exact HTS description and avoid reclassification
• Ensure REACH/ TSCA compliance certification for environmental handling of sulfonic acid compounds