L-Phenylalanine from China
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 — China → United States
137.5%
Rate breakdown
9903.04.6094.2%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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