7-Amino-1,3-naphthalenedisulfonic Acid Disodium Salt from Germany
The disodium salt form of 7-Amino-1,3-naphthalenedisulfonic acid provides better water solubility for dye coupling processes. Explicitly covered under HTS 2921.45.10.00 as salts of the listed naphthalenedisulfonic acid amine. Inorganic salts of organic compounds classify with the parent organic acid per Chapter 29 note 3(C).
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify sodium content and counterion ratio in COA to confirm salt classification under organic parent
• Use moisture-proof packaging; hygroscopic nature affects assay during customs inspection