Thiosalicylic Acid from Mexico
Thiosalicylic acid (2-mercaptobenzoic acid) is an aromatic organo-sulfur compound with both thiol and carboxylic acid groups, classified under HTS 2930.90.4950. Meets all Chapter 29 criteria for chemically defined sulfur-carbon compounds. Used as rubber accelerator intermediate and analytical reagent.
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
• Provide melting point range (165-170°C) confirmation for authenticity
• Include batch analysis showing <0.5% disulfide impurity
• Declare intended rubber accelerator use doesn't affect bulk chemical classification