Tobias Acid (2-Amino-8-naphthalenesulfonic Acid) from Canada
Tobias acid is 2-amino-8-naphthalenesulfonic acid, a key intermediate for acid dyes and pigments. Although positionally distinct, its naphthylamine-sulfonic structure aligns with HTS 2921.45.25.00 mixtures provision for similar isomers. It qualifies as an aromatic monoamine derivative under Chapter 29 heading 2921.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Include melting point (140-142°C) and solubility data to confirm identity
• Ship in nitrogen-flushed bags to prevent oxidation of the amine group
• Avoid co-mingling with 2940 sugar derivatives to prevent Chapter note conflicts