Amino acids are the building blocks of life, fundamental to countless biological processes. Among these essential compounds, L-Cystine, identified by CAS number 56-89-3, holds a unique and significant position due to its sulfur content and its role in protein structure and biological function. As a supplier of fine chemicals, understanding the intricacies of amino acids like L-Cystine is crucial for serving our clientele effectively across diverse sectors.

L-Cystine: Chemical Structure and Properties

L-Cystine is a non-essential amino acid, meaning the body can synthesize it. It is formed by the oxidative dimerization of two molecules of L-cysteine, linked by a disulfide bond (-S-S-). This disulfide bridge is central to its properties and functions. The presence of sulfur atoms in its structure is what gives L-Cystine its particular importance in biological systems, particularly in the formation and stabilization of protein structures.

Key physical and chemical properties include its appearance as white crystals or crystalline powder, a pH typically between 5.0 and 6.5, and an assay generally above 98.5%. These characteristics are vital for formulators and researchers when selecting an L-Cystine supplier.

Functional Significance in Biochemistry and Beyond

The biological relevance of L-Cystine is extensive:

  • Protein Structure: It is a critical component of keratin, the primary structural protein in hair, nails, and the outer layer of skin. The disulfide bonds formed by cystine residues are essential for the strength and integrity of these tissues.
  • Antioxidant Properties: Through its interconversion with cysteine, L-Cystine plays a role in the body's antioxidant defense system, contributing to the synthesis of glutathione, a potent antioxidant.
  • Metabolic Functions: It is involved in various metabolic pathways, including the synthesis of coenzyme A, heparin, and biotin.

These intrinsic properties drive its applications in specialized industries.

Industrial Applications of L-Cystine

The demand for L-Cystine is substantial across several sectors, making it a key product for chemical suppliers:

  • Pharmaceuticals: Used in biochemical research, as a nutrient in amino acid infusions, and for its potential therapeutic benefits in conditions affecting cellular health and immunity.
  • Cosmetics: Incorporated into skincare and hair care products for its benefits in wound healing, strengthening hair and nails, and preventing skin allergies.
  • Animal Nutrition: Added to animal feed as a fortifier to support growth, improve organ function, and enhance coat quality.

Procurement and Supply Chain Considerations

For businesses looking to buy L-Cystine, partnering with a reliable manufacturer and supplier is essential. As a prominent L-Cystine supplier in China, we focus on delivering high-purity products that meet strict quality controls. We understand the importance of consistent supply and competitive pricing, especially for bulk orders. We encourage prospective clients to request a quote to discuss their specific requirements and to ensure a seamless procurement process.

In summary, L-Cystine (CAS 56-89-3) is far more than just a chemical compound; it is a vital amino acid underpinning critical biological functions and driving innovation in pharmaceuticals, cosmetics, and animal nutrition. By understanding its chemical nature and applications, businesses can make informed decisions when sourcing this essential ingredient.