Thioglycolic Acid from Canada
Thioglycolic acid (mercaptoacetic acid), HSCH2COOH, is a chemically defined organic compound containing a mercapto (-SH) group directly linked to a carbon atom and a carboxylic acid function. It falls under HTS 2930.90.4920 as a mercaptocarboxylic acid within the organo-sulfur compounds of Chapter 29. Commonly used in hair perming solutions, metal extraction, and polymer synthesis.
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
• Provide detailed chemical composition certificates and CAS number (68-11-1) to verify classification as a pure mercaptocarboxylic acid
• Ensure proper Hazard Class 8 labeling and UN 1940 documentation for corrosive liquid transport
• Avoid misclassification as mixtures; purity >98% required for heading 2930 separate compounds