Chemical products
  • DL-Methionine CAS 59-51-8

DL-Methionine CAS 59-51-8

DL-Methionine is supplied as a nutritional amino acid for feed applications, primarily used in livestock and poultry formulations to balance amino acid profiles and support growth performance. As an essential sulfur-containing amino acid, it is commonly incorporated into compound feeds where natural protein sources may be deficient in methionine.

It is typically used in premixes, concentrates, and complete feed formulations for poultry, swine, and aquaculture. DL-Methionine is generally supplied as a crystalline powder or granulated form suitable for uniform mixing in feed processing systems. Standard packaging, bulk supply, and documentation such as COA, TDS, and SDS are available to support feed industry procurement.

  • 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 use)
  • Package: Available in standard feed additive packaging; packaging can be arranged according to order quantity
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Product Description

Physicochemical Properties

ItemTypical Value
AppearanceWhite crystalline powder or granules
OdorSlight characteristic odor
Molecular Weight149.21 g/mol
Melting PointApprox. 280°C (decomposes)
SolubilitySlightly soluble in water
pH (aqueous solution)Typically slightly acidic to neutral
Bulk DensityVaries by form (powder or granule)

Typical Applications

  • Feed additive for poultry diets to support growth and feed efficiency
  • Amino acid supplementation in swine feed formulations
  • Use in aquaculture feed to balance essential amino acid profiles
  • Inclusion in premixes and concentrates for compound feed production

For related amino acid and nutrient raw material pages, compare L-Threonine, Taurine, and L-Lysine Hydrochloride.

Packaging

DL-Methionine is typically supplied as crystalline powder or granules packed in moisture-resistant bags with inner liners to maintain product stability. Packaging is designed to support handling in feed mills and transport over long distances. Packaging formats can be arranged according to order volume and logistics requirements.

Storage

Store in a cool, dry, and well-ventilated area. Keep packaging tightly sealed to prevent moisture uptake and maintain product flowability. Avoid exposure to direct sunlight and humid conditions during storage and transportation.

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.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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