7-Amino-1,3,6-naphthalenetrisulfonic acid (R-acid) from Japan
R-acid, chemically 7-amino-1,3,6-naphthalenetrisulfonic acid, is a trisulfonated naphthylamine for direct dyes. Listed under HTS 2921.45.20.00 for its aromatic amine-sulfonic structure per Chapter 29 definitions. Typically a soluble salt form for aqueous dye processing.
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
• Provide sulfonic group count via titration data to confirm trisulfonic identity versus di- or mono-
• Use child-resistant packaging if emetic added per note 1(g); declare safety additives explicitly
• For bulk imports, ensure no retail packing to avoid Chapter 32 exclusions