Indole-3-Propionic Acid from Mexico
Indole-3-propionic acid features a three-carbon carboxylic acid chain, under HTS 2933.99.0500 due to indole structure precedence. Used as neurotransmitter precursor and antioxidant.
Duty Rate — Mexico → United States
0%
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
Import Tips
• Chain length variation doesn't affect indole classification
• Water-soluble; verify dry powder vs solution form on import
• Growing nutraceutical use; pure chemical stays Chapter 29