Mercaptosuccinic Acid from Canada
Mercaptosuccinic acid (thiomalic acid) functions as a chelating agent in metal recovery processes and biochemical research. HTS 2930.90.49 covers this as an other organo-sulfur acid per the chapter's definition of compounds with S directly bound to C.
Duty Rate — Canada → United States
4.2%
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
• Verify not classifiable as sulfonated derivative (excluded from 2930) via FTIR analysis
• For lab/research quantities, include end-user certificates to avoid DEA scrutiny