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Basic Info.
Product Description
Cysteine is white crystal or crystalline powder, soluble in water, slightly smelly. The molecular formula of L-cysteine is C3H7NO2S, which belongs to non-essential amino acid, and it is an isomer of cysteine , which can be converted from methionine.
Use
1. In terms of cosmetics: it is used to produce perm essence, sunscreen, perfume, hair nourishing essence, etc. This high-grade perm essence and cold perm essence, have the advantages of easy perm, easy to maintain hairstyle, soft and not It can also make sunscreen and hair growth perfume;
2. In medicine: cysteine is mainly used in liver medicine, antidote, expectorant and other medicines. Cysteine and its derivatives can be used for liver poisoning and detoxification, antipyretic and analgesic, ulcer treatment, fatigue recovery, infusion and comprehensive amino acid preparations, etc., especially for expectorant; treatment of bronchitis and phlegm.
3. In food: bread fermentation accelerator, preservative. Cysteine is used as a fermentation aid, an antioxidant and stabilizer for milk powder and fruit juice, and a nutritional additive for pet food, etc.;
4. L-cysteine can be used as a raw material for the production of N-acetyl-L-, carboxymethylcysteine and other cysteine derivatives.
5. Accelerate the formation of gluten and prevent aging; used in natural fruit juices to prevent the oxidation and browning of VC; prevent radiation damage.
| Product Name: | L-Cystine |
| Synonyms: | (r-(r*,r*))-3,3'-dithiobis(2-aminopropanoicacid);1-cystine;3,3'-dithiobis(2-amino-,(r-(r*,r*))-propanoicaci;3,3'-dithiobis(2-aminopropanoicacid);3,3'-dithiobis-l-alanin;3,3'-Dithiobis(2-aminopropanoic acid);3,3'-Dithiodialanine;Alanine, 3,3'-dithiobis- |
| CAS: | 56-89-3 |
| MF: | C6H12N2O4S2 |
| MW: | 240.3 |
| EINECS: | 200-296-3 |
| Product Categories: | Amino Acids;Cysteine [Cys, C];Food and Feed Additive;Amino Acids;Nutritional Supplements;L-Amino Acids;Amino Acid Derivatives;amino |
| Mol File: | 56-89-3.mol |
| L-Cystine Chemical Properties |
| Melting point | >240 °C (dec.) (lit.) |
| alpha | -224 º(c=2 in 1M HCl) |
| Boiling point | 468.2±45.0 °C(Predicted) |
| density | 1.68 |
| refractive index | -222.5 ° (C=1, 1mol/L HCl) |
| storage temp. | 2-8°C |
| solubility | 1 M HCl: 100 mg/mL |
| form | Powder/Solid |
| pka | 1.0, 2.1, 8.02, 8.71(at 25ºC) |
| color | White |
| optical activity | [α]20/D 219±5°, c = 1% in 1 M HCl |
| Water Solubility | 0.112 g/L (25 ºC) |
| Merck | 14,2782 |
| BRN | 1728094 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | LEVWYRKDKASIDU-IMJSIDKUSA-N |
| CAS DataBase Reference | 56-89-3(CAS DataBase Reference) |
| NIST Chemistry Reference | L-Cystine(56-89-3) |
| EPA Substance Registry System | L-Cystine (56-89-3) |
Testing Items | Specifications | Results |
Appearance | White crystals or crystalline powder | Complies |
Specific rotation[a] D20 | +8.3°~ +9.5° | +8.7° |
State of solution | ≥95.0% | 98.5% |
Chloride | NMT 0.04% | 0.03% |
Ammonium | NMT0.02% | 0.015% |
Sulfate | NMT 0.03% | 0.02% |
Iron | NMT 10ppm | 4ppm |
Heavy metals (as Pb) | NMT 10ppm | 5ppm |
Other Amino Acids | Chromatographically not detectable | Complies |
Loss on drying | NMT 0.5% | 0.3% |
Residue on Ignition | NMT 0.10% | 0.05% |
Assay | 98.0%~101.0% | 99.1% |
PH | 4.5~5.5 | 5.2 |
SNC was established in 2006. After years of development, Good Fortune International joined the team in 2017 to jointly provide one-stop services for global users in the research and development, production, logistics, and sales of food, medicine, nutrition and health, and sports supplements.
The company has keen market observation and judgment, provides customers with the highest quality products and services with fast and sensitive response, and provides customers with "one-stop all-round" services! Committed to supplying healthy raw materials to the world, providing the highest quality raw materials for the world's health products, sports supplements, cosmetics, pharmaceuticals and other fields.