7-Amino-1,3-naphthalenedisulfonic Acid Disodium Salt from Japan
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 — 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
• 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