DL-2-Hydroxy-4-(Methylthio)butyric Acid from Mexico
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 — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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