Food, Pharmaceutical & Cosmetic Grade L-Cysteine CAS 63-68-3 Sulfur-Containing Amino Acid Antioxidant, Food Additive & Hair Care Raw Material

L-Methionine (also named L-Methionine, Abbr: L-Met, CAS:63-68-3,EINECS:200-562-9, HS Code:2930400000) is a white crystalline powder, a sulfur-containing essential amino acid with the molecular formula C₅H₁₁NO₂S. We supply feed grade, food grade and pharmaceutical grade products complying with FCC, USP, EP and international quality standards. It is soluble in water, slightly soluble in ethanol, insoluble in ether, with stable chemical properties. As an indispensable amino acid for protein synthesis and methyl metabolism, it is widely used in animal nutrition, food fortification, pharmaceutical manufacturing and health care industries.

Applications
Feed Industry (Core Application)
Essential amino acid additive for poultry, swine, ruminant and aquafeed. It balances dietary amino acid profile, improves protein utilization rate, promotes animal growth and weight gain, enhances egg production rate and milk yield, and improves feather and fur quality. It is one of the most critical limiting amino acids in compound feed formulations.
Food & Nutrition Industry
Food grade product serves as nutritional fortifier added to grain products, dairy products, infant formula and functional foods. It supplements essential methionine intake, optimizes amino acid composition, and meets human nutritional requirements for special populations such as athletes and postoperative patients.
Pharmaceutical Industry
Key raw material for compound amino acid injections, oral amino acid preparations and hepatoprotective drugs. It participates in liver detoxification and fat metabolism, helps prevent and treat fatty liver and cirrhosis, and is also used as a nutritional support component for patients with consumptive diseases.
Cosmetics & Health Care
Added to hair care products, skin care formulas and dietary supplements. It provides sulfur nutrition for hair and skin, maintains normal keratin synthesis, improves hair luster and toughness, and supports healthy nail growth, widely used in high-end personal care and nutraceutical products.
Biological & Cell Culture
Used as an essential amino acid component in cell culture media and biological fermentation media. It supports normal cell growth and protein expression, and is an indispensable raw material in biopharmaceutical and life science research.
Fine Chemical Synthesis
Applied as intermediate for synthesizing flavor substances, peptide drugs and specialty chemicals. It also acts as a stabilizer and antioxidant in certain industrial formulations to extend product shelf life.

Product Advantages
✅ High purity & low impurities: Strict quality control ensures content meets pharmacopoeia standards with minimal heavy metal residues
✅ High biological activity: Natural L-configuration with high absorption efficiency and bioavailability
✅ Full grade coverage: Feed, food and pharmaceutical grades available to match different application scenarios
✅ Stable quality: Uniform particle size, consistent batch quality, reliable performance in long-term use
✅ Compliant certifications: Complete quality documents, meeting global import regulations for food, feed and pharmaceutical raw materials
✅ Cost-effective supply: Stable production capacity and mature supply chain ensure competitive price and reliable delivery

Packaging & Storage
Standard packaging: 25kg fiber drums or woven bags with inner PE liner; 500kg / 1000kg FIBC bulk bags for large orders. Store in a cool, dry and well-ventilated warehouse at room temperature. Keep containers tightly sealed, away from strong oxidants, moisture and direct sunlight. Shelf life is 24 months under proper storage conditions.
Safety Information
Classified as non-hazardous goods for regular transportation. The product is non-toxic under normal use, and fine dust may cause mild irritation to eyes and respiratory tract. Wear dust mask and protective gloves during handling. In case of contact with eyes or skin, rinse immediately with plenty of clean water. Complete MSDS and relevant qualification certificates are available upon request.

With 15 years of experience in chemical foreign trade, we offer the following core strengths to support your procurement needs:
1.A 70,000 ㎡ warehouse (20,000 MT capacity) with moisture-proof and temperature-controlled systems, enabling efficient fulfillment of large-volume orders.
2.Free samples (Ship within 3-7 days) to let you test products at zero trial cost.
3.Transparent lead time for hazardous chemicals: 45–60 days, with clear delivery schedules.
4.Certified with a Hazardous Chemical Business License and ISO certification, ensuring smooth customs clearance.
5.6 packaging options with customizable logos to minimize product loss during transportation.
6.Over 400 chemical SKUs available for one-stop procurement, helping you reduce sourcing costs.
Please share your purchase volume, target market, and other requirements, and we will tailor a customized solution for you!