Tobias Acid (2-Naphthylamine-8-sulfonic Acid) from Mexico
Tobias acid is the sodium salt of 2-naphthylamine-8-sulfonic acid, widely used as a diazo component in manufacturing acid dyes and pigments. Classified under HTS 2922.21.4000 due to its status in additional U.S. note 3 to section VI, restricting imports for dye production. It qualifies as an oxygen-function amino-compound with amino, hydroxy, and sulfonic groups.
Duty Rate — Mexico → United States
16.5%
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
• Confirm quota eligibility under additional U.S. note 3 and apply for import licenses through the Department of Commerce if required
• Include spectroscopic data and purity certificates to distinguish from similar naphthylamine derivatives during customs examination
• Package with stabilizers only as permitted by chapter note (f) to avoid reclassification as a preparation