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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Declare as "sodium 4-amino-1-naphthalenesulfonate" CAS 119-78-8
• Salt forms have different solubility/hazard profiles; match SDS accordingly