DL-Methionine
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If premixed into complete animal feed
Blended into feed preparations, it becomes classified under Chapter 23 as mixed animal feed rather than pure chemical.
If sold as a pharmaceutical intermediate
Certain amino acid derivatives without sulfur function may shift to oxygen-function amino compounds in heading 2922.
If combined with mineral fertilizers
When mixed with animal/vegetable fertilizers, classification moves to Chapter 31 for fertilizer preparations.
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Import Tips & Compliance
• 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
Related Products under HTS 2930.40.00.00
L-Methionine USP Grade
L-Methionine USP Grade is the natural levorotatory form of methionine, meeting United States Pharmacopeia standards for purity and use in medical and nutritional supplements. Classified under HTS 2930.40.00.00 as a separate chemically defined organo-sulfur compound.
Methionine Feed Grade 99%
Methionine Feed Grade 99% is a high-purity powder formulation of DL-methionine designed for livestock nutrition, containing minimal impurities as per chapter note (a). It is classified under HTS 2930.40.00.00 for methionine organo-sulfur compounds.
Hydroxy Analog of Methionine (MHA)
2-Hydroxy-4-(methylthio)butanoic acid, known as MHA, is a liquid methionine analog functioning as a rumen-stable sulfur source for ruminant feed. Though chemically distinct, it is often associated with methionine classification under HTS 2930.40.00.00 for organo-sulfur feed compounds.
L-Methionine with Stabilizer
L-Methionine powder with added anticaking stabilizer for preservation during transport, as permitted by chapter note (f). This chemically defined organo-sulfur compound remains classified under HTS 2930.40.00.00.
Methionine Calcium Salt
Calcium salt of DL-methionine, an organo-sulfur compound where the salt form follows the parent methionine per chapter note on inorganic salts (C)(1). Classified under HTS 2930.40.00.00.
Dry Methionine Powder 98.5%
Dry DL-Methionine powder at 98.5% purity with minor impurities, qualifying as chemically defined under chapter note (a). Used in pet food formulations, classified under HTS 2930.40.00.00.