DL-2-Hydroxy-4-(Methylthio)butyric Acid
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mixed into complete animal feed
Blended into feed preparations, it becomes classified under Chapter 23 as dog/cat food or other animal feed, not pure chemical.
If in salt form like calcium salt
Sugar ethers/esters and salts thereof fall under heading 2940 per Chapter 29 note 1(c), shifting from organo-sulfur acids.
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Import Tips & Compliance
• 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
Related Products under HTS 2930.90.46.00
Alimet Feed Grade DL-Hydroxy Methionine
Commercial feed-grade DL-2-hydroxy-4-methylthiobutyric acid, the hydroxy analogue of DL-methionine, classified as an organo-sulfur acid under 2930.90.46.00. Used in poultry and swine diets to replace methionine, meeting Chapter 29 requirements for separate chemically defined compounds.
Rhodimet AT 88 Liquid DL-Hydroxy Methionine
Aqueous solution of DL-2-hydroxy-4-methylthiobutyric acid (88% concentration), the DL-hydroxy analogue of methionine, classified under 2930.90.46.00 per Chapter 29 note 1(d) for water-dissolved products. Used as a liquid methionine source in animal feed formulations.
MHA-Ca Calcium Salt of DL-Hydroxy Methionine Analogue
Calcium salt of DL-2-hydroxy-4-(methylthio)butyric acid, derived from the methionine hydroxy analogue, classified in 2930.90.46.00 per note 1(C)(1) for inorganic salts of organic acids. Enhances bioavailability in ruminant feeds.
Pure DL-HMTBA Powder USP Grade
USP-grade DL-2-Hydroxy-4-(methylthio)butanoic acid powder, the precise DL-hydroxy analogue of DL-methionine under 2930.90.46.00. Meets pharmacopeia standards for potential pharmaceutical or high-purity feed applications.
EcoMeth Hydroxy Methionine Analogue Granules
Granulated DL-hydroxy analogue of methionine with anti-caking stabilizer, classified under 2930.90.46.00 per note 1(f) for necessary preservatives. Designed for easy mixing in sustainable poultry feeds.