Sulfanilic Acid from Canada
Sulfanilic acid (4-aminobenzenesulfonic acid) is a white crystalline powder classified under HTS 2921.42.22.00 as an aniline derivative and salt thereof, consisting of a chemically defined aromatic monoamine with a sulfonic acid group. It serves as a key intermediate in dye manufacturing and pharmaceutical synthesis.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify purity ≥98% via Certificate of Analysis to confirm classification as chemically defined compound under Chapter 29
• Include SDS and REACH compliance docs; sulfonic acids may trigger hazardous material shipping requirements
• Avoid misclassification as sulfonated dye intermediate (3204) by ensuring no coloring properties