4-Amino-1-naphthalenesulfonic Acid from Canada
4-Amino-1-naphthalenesulfonic acid is an aromatic monoamine derivative of 1-naphthylamine with a sulfonic acid group, classified under HTS 2921.45.60.00 as a derivative of naphthylamine described in additional U.S. note 3 to section VI. It is commonly used as an intermediate in the production of azo dyes and pigments.
Duty Rate — Canada → United States
16.5%
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
Import Tips
• Verify chemical purity and provide Certificate of Analysis (CoA) to confirm classification under note 3 to section VI
• Ensure SDS and proper UN number for hazardous material shipping compliance
• Avoid misclassification as sulfonated dye under Chapter 32 by emphasizing amine-function principal characteristic