2-Mercaptopropionic Acid from Mexico
2-Mercaptopropionic acid is an alpha-thiol carboxylic acid used in pharmaceutical intermediates and metal chelation applications. Classified under HTS 2930.90.49 as an other organo-sulfur acid with the characteristic S-C bond structure defined in heading 2930.
Duty Rate — Mexico → United States
14.2%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Submit NMR or GC-MS spectra verifying molecular structure to distinguish from sulfonated derivatives excluded from heading 2930
• Declare pharmaceutical end-use if applicable; requires FDA registration and may need prior notice via ACE system