Sodium 1-Naphthol-4-sulfonate from Canada
The sodium salt of 4-Hydroxy-1-naphthalenesulfonic acid, used in azo dye coupling reactions. Classified under HTS 2908.99.06.00 per Chapter 29 note 5(C)(1), as inorganic salts of organic sulfo-function compounds are placed with the parent acid.
Duty Rate — Canada → United States
10%
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
• Include salt composition assay in documentation to support classification with parent acid
• Ensure no added stabilizers render it specific-use per Chapter 29 note (g)
• Label clearly to distinguish from dye preparations