L-cysteine Base | 52-90-4
Product Description:
Cysteine is white crystal or crystalline powder, soluble in water, slightly odorous, insoluble in ethanol, insoluble in organic solvents such as ether. Melting point 240 ℃, monoclinic system. Cysteine is one of the sulfur-containing amino acids, which is a non-essential amino acid.
In the organism, the sulfur atom of methionine is replaced with the hydroxyl oxygen atom of serine, and it is synthesized through cystathionine.
From cysteine, glutathione can be generated. glycerol. Cysteine is acid stable, but is easily oxidized to cystine in neutral and alkaline solutions.
The efficacy of L-cysteine Base:
It has cohesion in the body, etc.
Effectively prevent and treat radiation injury.
It maintains the activity of important sulfhydrylase in the keratin production of skin proteins, and supplements sulfur groups to maintain the normal metabolism of the skin and regulate the underlying melanin produced by the pigment cells in the lowest layer of the epidermis. It is a very ideal natural whitening cosmetic.
Whenever inflammation or allergy occurs, the sulfydrylase such as cholphosphatase is reduced, and L-cysteine supplementation can maintain the activity of the sulfydrylase and improve the skin symptoms of inflammation and allergy.
It has the effect of dissolving keratin, so it is also effective for skin diseases with keratin hypertrophy.
It has the function of preventing biological aging.
Technical indicators of L-cysteine Base:
| Analysis Item | Specification |
| Appearance | White crystals powder or crystalline powder |
| Identification | Infrared absorption spectrum |
| Specific rotation[a]D20° | +8.3°~+9.5° |
| State of solution | ≥95.0% |
| Ammonium (NH4) | ≤0.02% |
| Chloride (Cl) | ≤0.1% |
| Sulfate (SO4) | ≤0.030% |
| Iron (Fe) | ≤10ppm |
| Heavy metals (Pb) | ≤10ppm |
| Arsenic | ≤1ppm |
| Loss on drying | ≤0.5% |
| Residue on ignition ≤0.1% | |
| Assay | 98.0~101.0% |
| PH | 4.5~5.5 |
