Ammonium 1-Naphthol-4-sulfonate from Japan
Ammonium salt of 4-Hydroxy-1-naphthalenesulfonic acid, used in analytical chemistry. Classified in HTS 2908.99.06.00 following Chapter 29 rule for salts of sulfo derivatives.
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 cation ratio to avoid misclassification as organic base salt
• Use lab-grade labeling for compliance
• Monitor for emetic additions triggering safety note (g)