Phenylalanine Methyl Ester Hydrochloride from Mexico
Phenylalanine methyl ester hydrochloride is the ester salt of phenylalanine, classified in HTS 2922.49.37.00 per note 3(A) with the parent amino-acid. The ester maintains the oxygen-function amino-compound nature. Used as protected amino acid in solid-phase peptide synthesis.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Specify esterification confirmed by ester carbonyl IR peak; salts classified with parent per note 3(C)(1)
• Handle as corrosive solid (UN 3261); proper Hazard Class 8 labeling required