L-Methionine CAS:63-68-3

L-Methionine CAS:63-68-3 is a sulfur-containing aromatic neutral amino acid with the chemical formula C₅H₁₁NO₂S. It is an "essential amino acid" that the human body and animals cannot synthesize on their own and must obtain from food. The methylthio group (-S-CH₃) in its molecular structure is a unique functional group, giving it excellent physiological activity. It is not only a core raw material for protein synthesis but also an important donor in methylation reactions in the body, participating in the synthesis of biologically active substances such as choline, creatine, and adrenaline. It can also be converted into cysteine, participating in the synthesis of glutathione and exerting antioxidant effects. This product is a white or slightly yellowish crystalline powder at room temperature, odorless or with a slight characteristic odor, slightly soluble in water, and sparingly soluble in organic solvents such as ethanol and ether. It is widely used in feed, food, medicine, and health products, and is one of the core raw materials with both nutritional supplementation and physiological regulation functions.

L-methionine, as a "sulfur-containing essential amino acid," derives its core value from providing essential nutritional support to humans and animals, while also participating in the regulation of key physiological processes as a methyl donor and antioxidant precursor. Currently, the animal feed industry is its most important application area, accounting for over 80% of global consumption; with increasing attention to nutrition and health, its application in the food, pharmaceutical, and health supplement sectors is gradually increasing, and market demand continues to grow.

1. Feed Industry: Core Nutritional Fortifier (Core Application Area)

In livestock and aquaculture, corn-soybean meal-based feeds are generally deficient in L-methionine, failing to meet the growth needs of animals. Adding L-methionine balances the amino acid composition of the feed, improves its nutritional value, promotes animal growth, enhances production performance, and reduces breeding costs. It is an indispensable core nutritional fortifier in the feed industry, especially crucial for poultry growth.

2. Food Sector: Nutritional Fortifiers and Food Additives

As a food nutritional fortifier permitted for use in China (GB 14880-2012), L-methionine can be used to fortify various foods, supplementing the body's essential sulfur-containing amino acids. It can also be used as a flavoring agent to improve food taste and is widely used in infant formula, health foods, dairy products, and condiments.

3. Pharmaceutical Field: Pharmaceutical Raw Materials and Excipients

High-purity L-methionine, due to its excellent physiological activity and safety, has become an important raw material in the pharmaceutical field. It can be used in applications such as amino acid infusions, drug synthesis, and liver-protecting drug formulations, playing a significant role in disease treatment and health management.

4. Other Fields

- Cosmetics: Used as a cosmetic additive in skincare products, conditioners, shampoos, etc.; it promotes skin cell metabolism, enhances the skin's antioxidant capacity, delays skin aging, and improves dull and rough skin; in hair care products, it repairs damaged hair, enhances hair strength and shine, and reduces split ends;

- Biochemical Engineering: Used as a component of microbial culture media for bacterial culture and biological fermentation processes; it provides essential amino acids and sulfur nutrients for microbial growth, improving fermentation efficiency; it can also be used as a raw material for the synthesis of other sulfur-containing compounds in the production of fine chemical products;

- Scientific Research: As a commonly used laboratory reagent, it is widely used in scientific research experiments in fields such as biochemistry, molecular biology, and nutrition, such as studies on protein synthesis mechanisms, amino acid metabolism, and liver function.

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