L-Cystine
Chemical Structural Formula:
Physical & Chemical Properties:
| Characteristics | White hexagonal plate crystal or crystalline powder; Odorless and tasteless |
| Relative Density | 1.677 |
| Boiling Point | 468.2±45.0℃(Predicted) |
| Melting Point | 260℃ |
| Refractive Index | -222.5°(C=1, 1mol/L HCl) |
| Optical Activity | [α]20/D 219±5°, c = 1% in 1 M HCl |
| Solubility | Soluble in dilute acid and alkaline solution, very slightly soluble in water, insoluble in ethanol, ether, benzene and chloroform. |
Specifications of our L-Cystine:
| Testing Items | Specifications |
| Appearance | White crystals or crystalline powder |
| Identification | Infrared absorption |
| Specific Rotation | -215°~ -225° |
| Transmittance | Not less than 98.0% |
| Chloride | Not more than 0.02% |
| Ammonium Salt | Not more than 0.02% |
| Sulfate | Not more than 0.02% |
| Iron | Not more than 20ppm |
| Heavy Metals(Pb) | Not more than 10ppm |
| Arsenic(As) | Not more than 1ppm |
| Other Amino Acids | Conforms |
| Loss on Drying | Not more than 0.20% |
| Residue on Ignition | Not more than 0.10% |
| Assay | 98.5% ~ 101.0% |
| pH Value | 5.0 ~ 6.5 |
L-Cystine Has A Wide Range of Uses:
♔ Used in biochemical research. Prepare biological medium. L-Cystine is used in biochemical and nutritional research, and in medicine, it can promote the oxidation and reduction function of body cells, increase white blood cells and prevent the development of pathogenic bacteria. It is mainly used for various hair loss diseases. It is also used for dysentery, typhoid fever, influenza and other acute infectious diseases, asthma, neuralgia, eczema and various poisoning diseases, etc., and has the effect of maintaining protein configuration. Also used as a food flavoring agent.
♔ Biochemical reagents: used for the preparation of biological culture medium. L-Cystine is also an important component of amino acid infusion and compound amino acid preparation.
♔ As a feed nutrition enhancer: L-Cystine is beneficial to animal development, increasing body weight, liver and kidney functions, and improving fur quality.
♔ L-Cystine can also be used as a cosmetic additive, which can promote wound healing, prevent skin allergies and treat eczema.
Packaging:
25kg per drum or according to the requirements from customers.
Storage Conditions:
Preserved in unopened original containers in a cool dry place before using; kept away from direct sunlight, heat and moisture.
Shelf Life:
24 months if stored under above mentioned conditions.
