DL-methionine

CAS Number
59-51-8
EC Number
200-432-1
Chemical Formula
C5H11NO2S
Molecular Weight
149.21 g/mol
FEMA Number
FEMA 3301

Description

DL-Methionine (CAS 59-51-8), also referred to as Hmet, is the racemic synthetic form of the essential sulfur-containing amino acid methionine. It functions as a nutritional supplement and precursor compound across feed, food, and pharmaceutical manufacturing. Controlled methionine supply is critical to formulation performance and biological efficacy in these industries. In animal nutrition, it is a primary feed additive for poultry, swine, and aquaculture, correcting deficiency in cereal-based diets.

This additive supports growth performance and feed conversion in livestock. Pharmaceutical manufacturers use it as an active ingredient or excipient in tablet and infusion formulations targeting liver support and amino acid therapy. In food fortification, it is incorporated into protein supplements, clinical nutrition products, and functional foods. These applications ensure amino acid profiling meets defined dietary standards for human consumption.

Personal care formulators apply it as an antioxidant and conditioning agent in hair and skin preparations. It helps protect formulations from oxidative degradation, maintaining product stability and efficacy over time. The product is supplied as a white crystalline powder or free-flowing granule. Granulated forms are often preferred for feed premix blending due to improved handling characteristics and reduced dust during processing.

Standard grades include feed-grade, USP, and food-grade (FCC). These quality standards ensure the material is suitable for its intended application in highly regulated global markets. Bulk supply is available in 25 kg bags or bulk containers depending on specific application requirements. This flexibility allows for efficient logistics and storage across various manufacturing scales and industrial sectors.

Other Names (Synonyms)

Hmet|DL-Methioninum|alpha-amino-gamma-methylmercaptobutyric acid|2-amino-4-(methylthio)butanoic acid|2-amino-4-(methylsulfanyl)butanoic acid|(+-)-Methionine|Met|Acimetion

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point 281 °C (decomp)
Boiling Point 306.9±37.0 °C(Predicted)
Density 1.3 g/cm³
Appearance White crystalline powder
Color White
Odor mild sulfurous acidic
Form Crystals or Crystalline Powder
Water Solubility 2.9 g/100 mL (20 ºC)
Refractive Index 1.5216 (estimate)
Log P 0.37

Trade & Regulatory

HS Code 29304000
Storage Class 11 - Combustible Solids
WGK (Germany) 2

Documentation

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