DL-Tyrosine from Canada
DL-Tyrosine is a synthetic aromatic amino acid with phenolic oxygen function, falling under HTS 2922.49.37.00 as 'other' oxygen-function amino-compounds. Despite its phenolic group, it qualifies due to single carboxyl classification and exclusion from proteinogenic listings. Commonly used in nootropic supplements and biochemical research.
Duty Rate — Canada → United States
Rate breakdown
Import Tips
• Include spectral analysis (NMR/IR) verifying aromatic structure and single oxygen-function amino-acid nature to prevent misclassification as phenols (2907)
• Label with correct nomenclature avoiding 'L-tyrosine' designation if racemic; racemates have different regulatory considerations
• Watch for reclassification as feed-grade additives (2309) if impure or mixed with carriers; must be >98% pure chemically defined compound