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2933.99.05.00/5-Methoxyindole/China

5-Methoxyindole from China

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 — China → United States

12.5%

Rate breakdown

9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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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