Industrial Grade Thioglycolic Acid from Mexico
Technical grade thioglycolic acid used in polymer synthesis and metal extraction, specifically classified under HTS 2930.90.4910. Meets Chapter 29 requirements as a separate chemically defined organo-sulfur acid with direct C-S bond.
Duty Rate — Mexico → 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
• Include assay certificate showing ≥80% purity to distinguish from mixtures in 3824
• Label as UN 1940 Corrosive Liquid, pH <2; ensure DOT-compliant packaging
• Document end-use to prevent reclassification as hair waving preparation under 3305