DL-2-Hydroxy-4-(Methylthio)butyric Acid from China
This is the DL-hydroxy analogue of DL-methionine, a chemically defined organo-sulfur compound with a hydroxy group replacing the amino group. It falls under HTS 2930.90.46.00 as an acid within the organo-sulfur compounds heading, used primarily as a feed additive. The product is supplied as a white crystalline powder for animal nutrition.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 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 to confirm it meets the chemical definition under Chapter 29 notes; ensure FDA prior notice for animal feed use
• Common pitfall: misclassifying as a finished feed product