DL-3-(3,4-Dihydroxyphenyl)alanine (DL-DOPA) from Canada
DL-3-(3,4-Dihydroxyphenyl)alanine, commonly known as DL-DOPA, is a synthetic form of the amino acid precursor to dopamine used in pharmaceutical synthesis for treating Parkinson's disease. It falls under HTS 2922.50.10.00 as an explicitly listed aromatic amino-acid-phenol with oxygen function, containing both amino and phenolic hydroxy groups.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6094.2%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Provide chemical purity certificates and CAS number (59-92-7) documentation to verify identity as listed compound
• Ensure proper Hazard Communication labeling (H301, H361d) and comply with TSCA/DOT regulations for import
• Avoid misclassification as finished pharmaceutical; declare as bulk chemical intermediate