Product name: L-Cystine

CAS: 56-89-3

Molecular formula: C6H12N2O4S2

EINECS number: 200-296-3

Properties

L-cystine is a white hexagonal plate crystal or white crystalline powder.

Uses L-cystine has a wide range of uses

1. Used in biochemical research. Preparation of biological culture medium. Used in biochemical and nutritional research, it has the effects of promoting the oxidation and reduction function of body cells, increasing white blood cells and preventing the development of pathogens in medicine. It is mainly used for various alopecia. It is also used for acute infectious diseases such as dysentery, typhoid fever, influenza, asthma, neuralgia, eczema and various poisoning diseases, and has the function of maintaining protein configuration. It is also used as a food flavoring agent.

2. Biochemical reagent, used for the preparation of biological culture medium. It is also an important component of amino acid infusion and compound amino acid preparations

3. As a feed nutrient enhancer, it is beneficial to animal development, increase body weight and liver and kidney function, and improve fur quality.

4. It can be used as a cosmetic additive to promote wound healing, prevent skin allergies and treat eczema.

Content analysis

The nitrogen content is determined by the Kjeldahl method. The sample is taken in an amount of 200 mg, and L-cystine is equal to N×8.58.

Chemical properties 

White flaky crystals or crystalline powder; very slightly soluble in water; insoluble in ethanol and other organic solvents, easily soluble in dilute acid and alkaline solution, easily decomposed in hot alkaline solution; pI 4.6; decomposition point 260-261℃; specific rotation [α] 20D-223.4° (0.5-2.0mg/ml, 5mol/LHCl).

Uses

1. Used in biochemical research, preparation of biological culture medium, and in medicine for the prevention and treatment of hepatitis, radiation damage, various alopecia, and drug poisoning. It can also be used as an auxiliary treatment for acute infectious diseases, bronchial asthma, neuralgia, eczema, and burns.

2. Nutritional supplements and flavoring agents. Used for breast milking of milk powder. Dough gluten enhancer, used in baked goods (yeast starter), baking powder. Used in medicine to promote wound healing. Treatment of skin allergies, detoxification agent, hematopoietic agent, etc.

3. Cystine is an important component of amino acid infusion and compound amino acid preparations. It is used to prevent and treat congenital homocystinuria, various alopecia, hepatitis, radiation damage, and macrocytopenia caused by various reasons and drug poisoning. It is also used as an auxiliary treatment for acute infectious diseases, bronchial asthma, neuralgia, eczema, and burns.

4. L-cystine is a feed nutrient enhancer, which is beneficial to animal development, increases body weight and liver and kidney function, and improves fur quality.

5. Used in biochemistry and nutrition research. In medicine, it promotes the oxidation and reduction function of body cells, increases white blood cells and prevents the development of pathogens. It is mainly used for various alopecia. It is also used for acute infectious diseases such as dysentery, typhoid fever, influenza, asthma, neuralgia, eczema and various poisoning diseases, and has the function of maintaining protein configuration. It is also used as a food flavoring agent.

6. Important pharmaceutical intermediates, preparation of compound amino acid oral preparations or infusions, dyes, cosmetics, dairy product additives, oil antioxidants, etc. It is also used in heavy metal detoxifiers, hepatitis and other drugs. It can promote the body's cell oxidation-reduction ability, increase white blood cells to prevent the development of pathogens, can reduce leukemia, coronary heart disease, prevent and treat fatty liver cirrhosis, promote hair growth and prevent skin aging, and also treat typhoid fever, dysentery, influenza, asthma, neuralgia, eczema and various poisoning diseases.

7. Some tumor cell lines require cystine or cysteine in the culture medium; various microorganisms must grow.

Production method

L-cystine is a sulfur-containing amino acid that exists in small amounts in proteins, mostly in keratin in hair, nails, etc. It can also be obtained by synthesis. Industrially extracted from hair, the yield can reach 7.5-8%. In actual production, some only reach 5%.

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