L-Cysteine
| Common Name | L-Cysteine | ||
|---|---|---|---|---|
| CAS Number | 52-90-4 | Molecular Weight | 121.15800 | |
| Density | 1.334 g/cm3 | Boiling Point | 293.9ºC at 760 mmHg | |
| Molecular Formula | C3H7NO2S | Melting Point | 220ºC | |
| Refractive Index | 8.8 ° (C=8, 1mol/L HCl) | Flash Point | 131.5ºC | |
Food Grade:
| Item | Specifications (AJI97 ) |
| Appearance | White crystal or crystalline powder; tasteless |
| Assay, % | 98.5~101.0 |
| Specific rotation | -218°~ -224° |
| Loss on drying, % | ≤0.2 |
| Transmittance, % | ≥98.0 |
| Chloride (as Cl), % | ≤0.02 |
| Sulfate (as SO4), % | ≤0.02 |
| Ammonium as (as NH4), % | ≤0.02 |
| Iron (as Fe), % | ≤0.001 |
| Heavy Metals (as Pb), % | ≤0.001 |
| pH Value | 5.0~6.5 |
| Residue on ignition, % | ≤0.1 |
| Other amino acid | Conforms |
| Item | Specifications (AJI97 ) |
Pharm Grade:
| Item | Specifications (AJI97 ) |
| Appearance | White crystal or crystalline powder; tasteless |
| Assay, % | 98.5~101.0 |
| Specific rotation | -218°~ -224° |
| Loss on drying, % | ≤0.2 |
| Transmittance, % | ≥98.0 |
| Chloride (as Cl), % | ≤0.02 |
| Sulfate (as SO4), % | ≤0.02 |
| Ammonium as (as NH4), % | ≤0.02 |
| Iron (as Fe), % | ≤0.001 |
| Heavy Metals (as Pb), % | ≤0.001 |
| pH Value | 5.0~6.5 |
| Residue on ignition, % | ≤0.1 |
| Other amino acid | Conforms |
| Item | Specifications (AJI97 ) |
| Appearance | White crystal or crystalline powder; tasteless |
| Assay, % | 98.5~101.0 |
| Specific rotation | -218°~ -224° |
L-Cysteine Hcl Monohydrate,Colorless to white crystalls or crystal powder, slightly special smell sour, melting point 175 ºC (decomposition).Soluble in water, the aqueous solution is acidic, the pH value of 1% solution is about 1.7, and the pH value of 0.1% solution is about 2.4.Also soluble in alcohol, and acetic acid, not soluble in ether,, benzene, etc.It has the function of reducing, anti-oxidation and preventing non-enzymatic Browning.
L-Cysteine Hcl Monohydrate is soluble in water and can be quickly absorbed by the human body by injection or tablet.It is the main raw material for production of carboxymethyl cysteine and acetylcysteine.
L-Cysteine is widely used in fields of medicine, food processing, biological study, materials of chemical industry and so on.
Used in the cure of liver disease, antioxidant and antidote.
Used in cosmetic.
1. L-Cysteine hydrochloride monohydrate has an effective detoxification.
2. L-Cysteine hydrochloride monohydrate can effectively prevent and treat radiation injury.
3.L-Cysteine hydrochloride monohydrate can remove the skin melanin itself, change the nature of the skin itself, the skin becomes natural whitening. It is a kind of ideal natural whitening cosmetics.
4. L-Cysteine hydrochloride monohydratecan improve the symptoms of inflammation and skin allergies.
5.L-Cysteine hydrochloride monohydrate on horny skin disease is also effective hypertrophy.
6. L-Cysteine hydrochloride monohydrate has a function to prevent biological aging,
