7-Amino-1,3,6-naphthalenetrisulfonic acid (R-acid) from Germany
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 — Germany → United States
15.8%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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