2930.90.49.20/2-Mercaptopropionic Acid/Mexico

2-Mercaptopropionic Acid from Mexico

2-Mercaptopropionic acid (HS-CH2-CH2-COOH) is an organo-sulfur carboxylic acid with both mercapto and carboxyl groups on adjacent carbons. Classified under HTS 2930.90.4920 as 'other mercaptocarboxylic acids' per Chapter 29 notes defining organo-sulfur compounds. Used in pharmaceutical intermediates and chelating agents.

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
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Import Tips

• Submit NMR or GC-MS spectra confirming mercapto position and >95% purity for Chapter 29 classification

• Include SDS with GHS corrosive pictograms; UN 2922 for solid form handling

• Distinguish from thioethers (2930.20) by confirming free -SH via titration analysis

2-Mercaptopropionic Acid from Mexico — Import Duty Rate | HTS 2930.90.49.20