Sodium Salt of 1-Naphthylamine-4-sulfonic Acid from Canada
The sodium salt form improves water solubility for dye coupling processes. HTS 2921.45.90 includes salts of 1-Naphthylamine derivatives per Chapter 29 note 3(C)(1). Inorganic salt modification doesn't change organic compound heading.
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
• Declare as "sodium 4-amino-1-naphthalenesulfonate" CAS 119-78-8
• Salt forms have different solubility/hazard profiles; match SDS accordingly