Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer and supplier of L-Cystine, (H-Cys-OH)2, (CAS: 56-89-3) with high quality. As one of the largest amino acids suppliers in China, Ruifu Chemical manufactures qualified amino acids derivatives up to international standards, such as AJI, USP, EP, and FCC standard. We can provide COA, worldwide delivery, small and bulk quantities available. If you are interested in L-Cystine, Please contact: alvin@ruifuchem.com
| Chemical Name |
L-Cystine |
| Synonyms |
L-(-)-Cystine; (H-Cys-OH)2; Laevo-Cystine; (-)-Cystine; (-)-3,3'-Dithiobis(2-Aminopropanoic Acid); 3,3'-Dithiobis-L-Alanine |
| Stock Status |
In Stock, Production Capacity 2000 Tons per Year |
| CAS Number |
56-89-3 |
| Molecular Formula |
C6H12N2O4S2 |
| Molecular Weight |
240.29 |
| Melting Point |
>240℃(dec.) (lit.) |
| Boiling Point |
468.2±45.0℃ |
| Density |
1.68 |
| Solubility |
Insoluble in Water, Ethanol and Ether. Dissolves in Dilute Hydrochloric Acid |
| Solubility in HCl |
Almost Transparency |
| Storage Temp. |
Sealed in Dry, Store at Room Temperature |
| COA & MSDS |
Available |
| Classification |
Amino Acid Derivatives |
| Brand |
Ruifu Chemical |
| Hazard Codes |
Xi,Xn |
RTECS |
HA2690000 |
| Risk Statements |
36/37/38-22 |
Hazard Note |
Irritant |
| Safety Statements |
26-36-24/25 |
TSCA |
Yes |
| RIDADR |
2811 |
Packing Group |
III |
| WGK Germany |
3 |
HS Code |
2930901000 |
| Items |
Inspection Standards |
Results |
| Appearance |
White Crystals or Crystalline Powder, Tasteless |
Conforms |
| Identification |
Infrared Absorption Spectrum |
Conforms |
| Specific Rotation [α]20/D |
-218.0° to -224.0°(C=2, 1N HCl) |
-218.6° |
| State of Solution (Transmittance) |
Clear and Colorless ≥98.0% |
98.5% |
| Chloride (Cl) |
≤0.020% |
<0.020% |
| Sulfate (SO4) |
≤0.020% |
<0.020% |
| Ammonium (NH4) |
≤0.020% |
<0.020% |
| Iron (Fe) |
≤10ppm |
<10ppm |
| Heavy Metals (Pb) |
≤10ppm |
<10ppm |
| Arsenic (As2O3) |
≤1.0ppm |
<1.0ppm |
| Other Amino Acids |
Chromatographically Not Detectable |
Conforms |
| Loss on Drying |
≤0.20% |
0.10% |
| Residue on Ignition |
≤0.10% |
0.04% |
| Assay |
98.5 to 101.0% (Titration: Anhydrous Basis) |
99.8% |
| pH Test |
5.0 to 6.5 |
5.6 |
| Origin |
Non-Animal Source |
Conforms |
| Residual Solvents |
Conforms |
Conforms |
| Conclusion |
Accords with the Standard of AJI92; USP37 |
| Shelf Life |
24 Months From Manufacture Date if Stored Properly |
| Main Uses |
Amino Acids; Food Additives; Pharmaceutical Intermediates |
Package: Fluorinated Bottle, 25kg/bag, 25kg/Cardboard Drum, or according to customer's requirement.
Storage Condition: Store in sealed containers at cool, dry and ventilated warehouse away from incompatible substances. Protect from light and moisture.
How to Purchase? Please contact Dr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com
15 Years Experience? We have more than 15 years of experience in the manufacture and export of a wide range of high quality pharmaceutical intermediates or fine chemicals.
Main Markets? Sell to domestic market, North America, Europe, India, Korea, Japanese, Australia, etc.
Advantages? Superior quality, affordable price, professional services and technical support, fast delivery.
Quality Assurance? Strict quality control system. Professional equipment for analysis include NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, K.F, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, etc.
Samples? Most products provide free samples for quality evaluation, shipping cost should be paid by customers.
Factory Audit? Factory audit welcome. Please make an appointment in advance.
MOQ? No MOQ. Small order is acceptable.
Delivery Time? If within stock, three days delivery guaranteed.
Transportation? By Express (FedEx, DHL), by Air, by Sea.
Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.
Custom Synthesis? Can provide custom synthesis services to best fit your research needs.
Payment Terms? Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc.
L-Cystine, (H-Cys-OH)2, (CAS: 56-89-3) is a sulfur-containing amino acid. 1. L-Cysteine has an effective detoxification. 2. L-Cysteine can effectively prevent and treat radiation injury. 3. LCysteine 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 can improve the symptoms of inflammation and skin allergies. 5. L-Cysteine on horny skin disease is also effective hypertrophy. 6. L-Cysteine has a function to prevent biological aging. 7. Cysteine is a kind of natural amino acid, has many uses in food processing, it is mainly used for baking products, as a necessary component of dough improver. 8. For biochemical research. Prepare biological culture medium. It is used in biochemistry and nutrition research. 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 alopecia. It is also used for acute infectious diseases such as dysentery, typhoid, influenza, asthma, neuralgia, eczema and various poisoning diseases, and plays a role in maintaining protein configuration. It is also used as food flavoring agent. 9. Biochemical reagent, used for the preparation of biological culture medium. It is also an important component of amino acid infusion and compound amino acid preparation. 10. As feed nutrition enhancer, it is conducive to animal development, increase body weight, liver and kidney function and improve fur quality. 11. It can be used as cosmetic additive to promote wound healing, prevent skin allergy and treat eczema.