Mercaptosuccinic Acid from China
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 — China → United States
41.7%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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