Description

L-Methionine CAS NO 63-68-3 is an essential sulfur-containing amino acid, serving as a critical building block for proteins and a key precursor in various metabolic pathways. Its primary commercial value lies in its role as a vital nutritional supplement and feed additive to ensure optimal growth and health in livestock, poultry, and aquaculture. This high-purity compound is indispensable for manufacturers in the animal nutrition, pharmaceutical, and food fortification industries, where consistent quality and reliable supply are paramount.

Application

• Animal Feed & Nutrition: A fundamental additive in poultry, swine, and aquaculture feed to meet sulfur-amino acid requirements, promoting growth, feathering, and overall animal health.
• Pharmaceutical Intermediates: Used as a key chiral building block in the synthesis of various pharmaceuticals, including parenteral nutrition solutions and specialized drugs.
• Food & Beverage Fortification: Incorporated into dietary supplements, infant formula, and functional foods to enhance nutritional profiles and support human health.
• Cosmetics & Personal Care: Employed in hair care and skin care formulations for its purported antioxidant properties and role in keratin synthesis.
• Biotechnology & Cell Culture: An essential component of cell culture media for the production of vaccines, monoclonal antibodies, and other biologics.
• Chemical Synthesis: Serves as a starting material or intermediate in organic synthesis and the production of specialty chemicals.

Basic Information

Product Name	L-Methionine
CAS No.	63-68-3
Molecular Formula	C5H11NO2S
Molecular Weight	149.21 g/mol
Synonyms	(2S)-2-Amino-4-(methylsulfanyl)butanoic acid; L-2-Amino-4-(methylthio)butyric acid; L-α-Amino-γ-methylthiobutyric acid; Met; L-Met; (S)-Methionine; H-Met-OH
EINECS	200-562-9

Quality Control

Our L-Methionine is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure it meets stringent specifications for identity, purity, and safety, aligning with relevant industry standards such as USP, FCC, and EP. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of moisture.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.5%
Specific Rotation	+21.0° to +25.0°
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Total impurities ≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.