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
110%
Rate breakdown
9903.04.6095.8%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 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