4-Sulfobenzophenone from Mexico
4-Sulfobenzophenone features sulfonic acid group substitution, classifying as sulfonated aromatic ketone derivative per HTS 2914.79.40.00. Applied in water-soluble photoinitiators.
Duty Rate — Mexico → United States
5.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Specify free acid vs. sodium salt form; salts follow chapter note 3(C)
• Hygroscopic; package with silica gel desiccants
• Water solubility testing documentation aids aqueous solution declarations