o-Naphthionic Acid (1-Amino-2-naphthalenesulfonic Acid) from Mexico
o-Naphthionic acid, or 1-amino-2-naphthalenesulfonic acid, is a chemically defined aromatic monoamine derivative with a sulfonic acid group, used as an intermediate in azo dye synthesis. It is a derivative of 1-naphthylamine, retaining the primary amine function, and is classified under the tariff item for naphthylamine derivatives. The sulfonic acid substituent does not alter its essential character.
Duty Rate — Mexico → Canada
0%
Import Tips
• Verify the product is a separate chemically defined compound under Chapter 29 Note 1(a)
• If the product is a salt, ensure it is classified with the parent compound per Note 5(C)(1)
• Provide a certificate of analysis to the CBSA to confirm the chemical structure