Tobias Acid (2-Amino-1-naphthalenesulfonic acid) from Mexico
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 — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
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