DL-Phenylalanine from China

DL-Phenylalanine is an aromatic amino acid containing a single carboxyl oxygen function, classified under HTS 2922.49.37.00 as an oxygen-function amino-compound that is neither a proteinogenic amino acid nor a drug. It is used as a nutritional supplement and in pharmaceutical intermediates. The code covers other aromatic amino acids and their simple derivatives not specified elsewhere.

Duty Rate — China → United States

137.5%

Rate breakdown

9903.04.6093.5%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)

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Import Tips

• Provide certificate of analysis confirming chemical purity and structure as an aromatic amino acid with single oxygen function to avoid reclassification

• Declare exact CAS number (150-30-1 for DL form) and ensure packaging complies with chemical transport regulations (DOT/UN)

• Avoid common pitfall of classifying as protein hydrolysates (3504); this is a separate chemically defined compound per Chapter 29 notes