L-Tyrosine from China
L-Tyrosine is a non-essential amino acid with a phenolic hydroxyl group, classified as an oxygen-function amino-acid under HTS 2922.49.4950. It serves as a precursor for neurotransmitters like dopamine and is used in nutritional supplements and pharmaceuticals.
Duty Rate — China → United States
137.5%
Rate breakdown
9903.04.6095.8%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
• Verify purity certificates (typically 98%+ for USP grade) to meet FDA food/supplement import standards
• Include Certificate of Analysis (CoA) showing optical purity (L-form vs DL) to avoid reclassification
• Label as 'food grade' or 'pharma grade' accurately to prevent CBP scrutiny on end-use claims