2-Mercaptobenzoic Acid from Germany
2-Mercaptobenzoic acid contains a thiol group ortho to carboxylic acid on benzene ring, classified under HTS 2930.90.4950 as other organo-sulfur acid. Direct C-S bonding qualifies for heading 2930; aromatic structure doesn't change classification. Used in synthesis of thiochromones and dyes.
Duty Rate — Germany → United States
20.8%
Rate breakdown
9903.04.6210.8%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include HPLC purity (>98%) and tautomer confirmation (thiol vs thione form)
• Verify no sulfonation occurred during synthesis per exclusion note 6
• Package under nitrogen to prevent air oxidation during transport