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Name
|
L-Cystine
|
|---|---|
|
Synonyms
|
(r-(r*,r*))-3,3'-dithiobis(2-aminopropanoic acid);
1-cystine;
3,3'-dithiobis(2-amino-, (r-(r*,r*))-propanoic acid;
3,3'-dithiobis(2-aminopropanoic acid);
3,3'-Dithiobis-L-alanine;
3,3'-Dithiobis(2-aminopropanoic acid);
3,3'-Dithiodialanine; Alanine, 3,3'-dithiobis-
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|
CAS Number
|
56-89-3
|
|
Molecular Formula
|
C6H12N2O4S2
|
|
Molecular Weight
|
240.3
|
|
EINECS Number
|
200-296-3
|
|
Melting Point
|
>240 °C (dec.) (lit.)
|
|
Optical Rotation
|
-224 ° (c=2 in 1M HCl)
|
|
Boiling Point
|
468.2±45.0 °C (Predicted)
|
|
Density
|
1.68
|
|
Bulk Density
|
300 kg/m³
|
|
Refractive Index
|
-222.5 ° (C=1, 1mol/L HCl)
|
|
Storage Conditions
|
2-8°C
|
|
Solubility
|
1M HCl: 100 mg/mL
|
|
Form
|
Powder/Solid
|
|
pKa Values
|
1.0, 2.1, 8.02, 8.71 (at 25°C)
|
|
Color
|
White
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|
pH Value
|
4.60
|
|
Optical Rotation (Optical Rotation)
|
[α]²⁰/D 219±5°, c = 1% in 1 M HCl
|
|
Biological Source
|
Plant
|
|
Water Solubility
|
0.112 g/L (25 °C)
|
| Usage |
1. It is used in biochemical research and the preparation of biological culture media. Applied in biochemical and nutritional research, it can promote the oxidation and reduction functions of body cells, increase white blood cells, and inhibit the growth of pathogenic bacteria in medicine. It is mainly used for various types of alopecia (hair loss), and also for acute infectious diseases such as dysentery, typhoid fever, and influenza, as well as asthma, neuralgia, eczema, and various toxic disorders. Additionally, it plays a role in maintaining protein configuration and is used as a food flavoring agent.
2. As a biochemical reagent, it is used in the preparation of biological culture media. It is also an important component of amino acid infusions and compound amino acid preparations. 3. Used as a feed nutritional fortifier, it is beneficial for animal growth, increasing body weight, improving liver and kidney functions, and enhancing fur quality. 4. It can be used as a cosmetic additive, which can promote wound healing, prevent skin allergies, and treat eczema. |
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