Tobias Acid (2-Naphthylamine-8-sulfonic Acid) from China
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 — China → United States
26.5%
Rate breakdown
9903.88.157.5%Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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