p-Toluidine-m-sulfonic Acid Sodium Salt from Mexico
The sodium salt form of p-Toluidine-m-sulfonic acid, a water-soluble aromatic amine sulfonate under HTS 2921.43.9040 per Chapter 29 salt classification rules. Used in azo dye coupling processes and as a chemical intermediate.
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
• Declare exact salt form and counterion (sodium) as organic salts classified with parent compound per note 3(C)
• Test for water content; solutions may require heading 29 note (d) justification for chemical purity
• Avoid retail packaging that could trigger Chapter 32 exclusion for coloring matter preparations