N-Acetyl-DL-tryptophan from China
N-Acetyl-DL-tryptophan is an acetylated derivative of the amino acid tryptophan, classified under HTS 2942.00.50.00 as an 'other' organic compound. This synthetic amino acid derivative features both amine and carboxylic acid functions with an indole ring, falling outside specific amino acid headings.
Duty Rate — China → United States
137.5%
Rate breakdown
9903.04.6096.3%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
• Include spectroscopic data (NMR, MS) to verify chemical structure and stereochemistry during customs review
• Declare exact enantiomeric composition (DL vs L-form) to prevent reclassification under amino acid headings
• Check REACH compliance if transshipping through EU for chemical safety documentation