What does the DL prefix mean for Methionine?

DL-Methionine is a racemic mixture containing both D- and L-methionine. L-methionine is the naturally occurring biologically active isomer, while the DL form is produced as a cost-effective feed ingredient and is used in animal nutrition.

How is DL-Methionine different from methionine hydroxy analog?

DL-Methionine is the amino acid itself, whereas methionine hydroxy analog is a precursor compound with a hydroxyl group instead of the amino group. They are different methionine sources and should not be treated as the same product.

What does feed-grade DL-Methionine normally specify?

Feed-grade material commonly specifies about 99.0% minimum methionine content. Additional quality checks may include loss on drying, residue on ignition, heavy metals, and appearance, depending on the supplier and regional feed-additive requirements.

How should DL-Methionine be stored?

Keep it in tightly sealed, moisture-resistant packaging in a cool, dry, well-ventilated area. Protecting the powder or granules from moisture and humid conditions helps maintain flowability and feed-mixing performance.

DL-Methionine CAS 59-51-8

DL-Methionine, CAS 59-51-8, a feed-grade essential sulfur amino acid supplied as powder or granules, is positioned for amino acid balancing in animal nutrition. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 59-51-8
Synonyms: DL-Methionine; Methionine; DL-2-Amino-4-(methylthio)butyric acid
Einecs: 200-432-1
Molecular Formula: C5H11NO2S
Grade: Feed grade (animal nutrition)
Package: Standard feed additive packaging

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Product Description

DL-Methionine CAS 59-51-8 is a feed-grade essential sulfur amino acid with EC 200-432-1 and molecular formula C5H11NO2S.

Synonyms: Methionine; DL-2-amino-4-(methylthio)butyric acid.

CAS: 59-51-8.

Molecular formula: C5H11NO2S.

It is supplied as powder or granules.

It is a racemic mixture containing both D- and L-methionine.

It is positioned for amino acid balancing in poultry, swine, and aquaculture diets.

It supports protein synthesis, growth performance, and feed efficiency.

It is used in compound feeds, premixes, and concentrates.

Feed-grade material commonly specifies about 99.0% minimum methionine content.

Confirm methionine content, loss on drying, residue on ignition, heavy metals, and appearance.

Check compatibility with the target feed formulation and mixing process.

Store in tightly sealed, moisture-resistant packaging in a cool, dry, well-ventilated area.

Use appropriate PPE and prevent dust, spills, or contamination.

Confirm packaging suitable for the powder or granule form and order quantity, and follow the current SDS.

Every batch is checked for methionine content, loss on drying, residue on ignition, heavy metals, and appearance, with COA/TDS/SDS supplied per grade.

Confirm grade, packaging, and specification as required.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is DL-Methionine CAS 59-51-8 used for in animal nutrition?

A: It is a feed-grade essential sulfur amino acid used to balance amino acid profiles in poultry, swine, and aquaculture diets. It supports protein synthesis, growth performance, and feed efficiency in compound feeds, premixes, and concentrates.
Q:
What does the DL prefix mean for Methionine?

A: DL-Methionine is a racemic mixture containing both D- and L-methionine. L-methionine is the naturally occurring biologically active isomer, while the DL form is produced as a cost-effective feed ingredient and is used in animal nutrition.
Q:
How is DL-Methionine different from methionine hydroxy analog?

A: DL-Methionine is the amino acid itself, whereas methionine hydroxy analog is a precursor compound with a hydroxyl group instead of the amino group. They are different methionine sources and should not be treated as the same product.
Q:
What does feed-grade DL-Methionine normally specify?

A: Feed-grade material commonly specifies about 99.0% minimum methionine content. Additional quality checks may include loss on drying, residue on ignition, heavy metals, and appearance, depending on the supplier and regional feed-additive requirements.
Q:
How should DL-Methionine be stored?

A: Keep it in tightly sealed, moisture-resistant packaging in a cool, dry, well-ventilated area. Protecting the powder or granules from moisture and humid conditions helps maintain flowability and feed-mixing performance.

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