</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →

5-Methoxyindole from Mexico

5-Methoxyindole contains methoxy substitution on the benzene ring of indole, classified under HTS 2933.99.0500 as modified aromatic indole. Key intermediate for melatonin synthesis.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

Import Tips

Ether functionality doesn't override heterocyclic classification

Precursor to controlled substances; additional DEA documentation may apply

Position 5 vs 6 isomers; verify by HPLC chromatogram