4-Aminobenzenesulfonic Acid (Sulfanilic Acid) from Mexico
Sulfanilic acid is an aromatic monoamine derivative featuring an amino group and a sulfonic acid group on a benzene ring, classified under HTS 2921.42.90.00 as an aniline derivative and its salt. It is primarily used in the synthesis of dyes, pharmaceuticals, and optical brighteners.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
• Verify purity certificate (typically 99%+) and CAS number 121-57-3 for customs classification as chemically defined compound
• Include Safety Data Sheet (SDS) showing it's not put up for retail sale to avoid Chapter 32 reclassification