L - Cystine

• Basic Information
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  • Chemical Name: L - Cystine; Bis - [(2S)-2 - amino - 3 - sulfanylpropanoic acid] disulfide
  • CAS Number: 56 - 89 - 3
  • Molecular Formula:  C6​H12​N2​O4​S2​
  • Molecular Weight: 240.30
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• Physical and Chemical Properties
  • Appearance: White to off - white crystalline powder
  • Melting Point: 260 - 261 °C (with decomposition)
  • Solubility: Sparingly soluble in water (about 0.25 g/L at 25 °C), insoluble in e/thanol, e/ther, and chloroform. Soluble in dilute acids and alkalis.
  • Specific Rotation:  [α]D20​  = -215° to -225° (c = 1, in 1 N HCl)
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• Quality Specifications
  • Purity: (Dry basis) Usually ≥ 98.5%
  • Loss on Drying: Max. 0.5%
  • Residue on Ignition: Max. 0.1%
  • Heavy Metals: Max. 10 ppm
  • Arsenic: Max. 2 ppm
  • Related Substances: Individual impurity max. 0.5%, total impurities max. 1.5%
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• Uses
  • Food Industry: Used as a nutritional supplement to improve the protein quality of food. It can also be used in some food processing to adjust the texture and flavor of food.
  • Pharmaceutical Industry: An important raw material for the synthesis of some drugs. It is used in the treatment of skin diseases, liver diseases, and as an antioxidant in some formulations. Also used in the preparation of amino acid infusions.
  • Cosmetic Industry: Applied in cosmetics and hair - care products. It helps to strengthen hair and nails and has a certain effect on skin moisturization and anti - aging.
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• Storage and Handling
  • Storage: Store in a cool, dry, well - ventilated place, protected from light. Keep the container tightly closed to prevent moisture absorption and oxidation.
  • Handling: Wear appropriate protective equipment, such as gloves and goggles. Avoid generating dust during handling to prevent inhalation. In case of contact with skin or eyes, rinse immediately with plenty of water.
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• Safety Information
  • Hazard Statements: Generally regarded as safe when used in appropriate amounts. However, excessive intake may cause digestive discomfort. Contact with eyes and skin may cause irritation.
  • Precautionary Statements: Avoid inhalation of dust. Keep out of reach of children. In case of accidental ingestion, seek medical attention if symptoms occur.

Company Introduction: East Chemsources Limited was established in 2008, is a professional company engaged in the development of chemical products. In the past of 15 years，through continuous technological innovation and the use of talent introduction advantages, we have achieved rapid development, and has become an international diversified modern chemical enterprise. At present, our products have been exported to more than 80 countries,including food additives, medical raw materials, chemical products and personal care.

Since the establishment of the company, always adhere to the credibility first, quality first enterprise creed. Our company is committed to creating a customer-centric, customer-demand-oriented, customer value creation and achievement of customer dreams for the purpose of the service concept, with a broad vision and broad mind, committed to creating good benefits and market operation, to build corporate brand.