DL-Tryptophan from Japan
DL-Tryptophan racemic mixture used as sleep aid precursor and animal feed supplement post-1989 EMS outbreak clearance. HTS 2922.49.49 for other amino acids despite indole ring. Regulated for human consumption purity.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• ,Separate human vs animal grade shipments; different FDA oversight
• Declare serotonin pathway warnings for supplement labeling compliance