L-Phenylalanine from Mexico
L-Phenylalanine is an essential aromatic amino acid explicitly named in HTS 2922.49.10.00, featuring both amino and carboxylic acid groups. Widely used in nutritional supplements, pharmaceuticals, and as a sweetener precursor (aspartame). Meets criteria for oxygen-function amino-acids.
Duty Rate — Mexico → United States
15.8%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Specify L-enantiomer with optical rotation data (CAS 63-91-2)
• For food use, provide Kosher/Halal certs and amino acid purity >98.5%
• Segregate from D-isomer to avoid racemic mixture reclassification