DL-Methionine from China
DL-Methionine is a synthetic racemic mixture of D- and L-methionine, a chemically defined organo-sulfur amino acid essential for animal nutrition. It falls under HTS 2930.40.00.00 as methionine, used primarily as a feed additive to supplement methionine-deficient diets in poultry and swine.
Duty Rate — China → United States
37.5%
Rate breakdown
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 certificate (typically 99%+) and CAS number 59-51-8 for customs clearance; ensure COA specifies DL-form to avoid misclassification; common pitfall is contamination claims—use sealed, moisture-proof packaging