Indole-3-Propionic Acid from Canada
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 — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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