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4-Sulfobenzophenone from Canada

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 — Canada → United States

15.5%

Rate breakdown

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada

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