Naphthalene Trisulfonic Acid Sodium Salt from Germany
1,3,6-Naphthalenetrisulfonic acid trisodium salt, though containing multiple sulfo groups, classified under HTS 2904.10.32.00 per note 3. Dye manufacturing intermediate.
Duty Rate — Germany → United States
15.5%
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
• Confirm trisulfonation pattern via HPLC
• High water solubility (>50%) characteristic
• Dye precursor; verify end-use declaration