H Acid Monopotassium Salt from Mexico
The monopotassium salt of 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid (H acid) is specifically listed in HTS 2922.21.1000. This salt form offers different solubility characteristics than sodium salt for specific dye applications. Classifies as organic salt of enumerated base per chapter note 3(C).
Duty Rate — Mexico → United States
15.8%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Potassium assay (ICP-OES) verifies salt identity versus sodium analogue
• Different hazmat classification (UN 3265 vs UN 3077) than sodium salt
• Solubility profile testing confirms manufacturing grade specifications