Sodium Salt of 1-Naphthylamine-4-sulfonic Acid from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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