Tobias Acid (2-Amino-1-naphthalenesulfonic acid) from China
Tobias acid is a chemically defined aromatic monoamine derivative with a sulfonic acid group, specifically 2-amino-1-naphthalenesulfonic acid. It falls under HTS 2921.45.90.10 as a derivative of 1-naphthylamine per Chapter 29 note (a). Primarily used as an intermediate in azo dye synthesis.
Duty Rate — China → United States
41.5%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 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(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Provide chemical purity certificates (typically 98%+ min) and CAS number (84-86-6) documentation to verify identity
• Ensure SDS includes GHS classification for skin/eye irritant hazards; REACH compliance required for EU transshipment
• Avoid misclassification as finished dye (HTS 32); confirm no azo coupling has occurred