Product Overview
Key Characteristics
1.High-purity white crystalline powder, with excellent water solubility, easy for aqueous formulation and processing.
2.Free-base molecular structure, with higher biological activity than cysteine hydrochloride.
3.Core precursor of glutathione, with natural endogenous antioxidant and detoxification properties.
4.Dual supply sources (fermentation & animal hydrolysis) support customized requirements for different markets.
5.Stable physical and chemical properties, suitable for dry powder, capsule and tablet processing.
6.Compliant with international food additive standard E920, USP, EP, BP and AJI specifications.
Main Functions
1.Endogenous Antioxidant & Detoxification Support L-Cysteine is the key rate-limiting raw material for human glutathione synthesis. It scavenges free radicals, reduces oxidative tissue damage, and supports liver metabolic detoxification processes.
2.Keratin Synthesis Precursor It provides the sulfur required for keratin formation, improves hair cuticle repair, enhances hair toughness, and strengthens nail structure, making it a core nutrient for hair and nail health products.
3.Skin Barrier Repair & Anti-aging Promotes collagen metabolism in skin tissue, improves skin elasticity, repairs damaged skin barriers, and reduces skin oxidative aging caused by external stimulation.
4.Food Nutrition Fortification As food additive E920, it is used as amino acid fortifier in nutritional food, and acts as mild dough conditioner and browning inhibitor in baked food processing.
5.Pharmaceutical Intermediate Serves as raw material for synthesizing respiratory mucolytic agents, antioxidant preparations and amino acid infusion formulations, with high biological safety.
Main Applications
1.Dietary Supplements & Functional Food: Applied in infant formula powder, anti-aging antioxidant capsules, hair and nail health tablets, sports nutrition powder, and amino acid fortified functional food.
2.Cosmetics & Personal Care: Widely added in high-end shampoo, hair conditioner, hair repair serum, facial cleanser, moisturizing cream and other skin and hair care formulations.
3.Pharmaceutical Industry: Raw material for respiratory health preparations, mucolytic drugs, antioxidant pharmaceutical formulations, and amino acid infusion solutions.
4.Biochemical & Laboratory Use: Component of cell culture medium and microbial culture medium for biotech research and production.
Packaging and Storage
| Item | Detail |
|---|---|
| Packaging | 25 kg fiber drum |
| Storage Condition | Store in cool, dry and well-ventilated area |
| Handling | Keep container tightly sealed, protected from moisture and direct sunlight |
| Shelf Life | 24 months when properly stored |
| Product Name: | L-(+)-Cysteine | Other Name: | L-Cysteine;Cysteine,L-;Half-cystine;β-Mercaptoalanine;Thioserine;L-(+)-Cysteine;Cysteine;Propanoic acid,2-amino-3-mercapto-,(R)-;Cystein;L-Alanine,3-mercapto-;NSC 8746;(R)-2-Amino-3-mercaptopropanoic acid;(R)-Cysteine;2-Amino-3-mercaptopropionic acid;L-Cys;E 920;(R)-2-Amino-3-mercaptopropanoic acid;(R)-2-Amino-3-sulfanylpropanoic acid;(2R)-2-Amino-3-sulfanylpropanoic acid;2-Amino-3-mercaptopropanoic acid;11: PN: WO2021055880 SEQID: 12 claimed protein;4371-52-2;154605-72-8;1404190-35-7 |
| CAS No.: | 52-90-4 | Molecular Formula: | C3H7NO2S |
| InChIKeys: | InChIKey=XUJNEKJLAYXESH-REOHCLBHSA-N | Molecular Weight: | 121.15800 |
| Exact Mass: | 121.16 | EC Number: | 200-158-2 |
| UNII: | K848JZ4886 | DSSTox ID: | DTXSID8022876 |
| NCI Thesaurus Code: | C29609 | Color/Form: | Colorless crystals|White crystals |
| HScode: | 2930901000 | Categories: | Amino Acids and Derivatives |
| PSA: | 102.12000 | XLogP3: | -2.5 |
| Appearance: | DryPowder | Density: | 3 @ Temp: 45.00 °C”>1.6666 g/cm3 @ Temp: 45.00 °C |
| Melting Point: | 240 °C (decomp) | Boiling Point: | 293.9ºC at 760 mmHg |
| Flash Point: | 131.5ºC | Refractive Index: | 8.8 ° (C=8, 1mol/L HCl) |
| Water Solubility: | H2O: 280 g/L (25 ºC) | Storage Conditions: | Store at RT. |
| Vapor Pressure: | 6.73X10-7 mm Hg at 25 deg C (est) | Toxicity: | LD50 orally in Rabbit: 1890 mg/kg |
| Specific rotation: | Specific optical rotation: +6.5 deg at 25 °C/D (5 N HCl); +13.0 deg at 25 °C/D (glacial acetic acid) | PKA: | 1.71None |
| Henrys Law Constant: | Henry’s Law constant = 5.30X10-11 atm-cu m/mol at 25 °C (est) | Dissociation Constants: | 1.71|pK1 1.71 /carboxylic/; pK2 8.33 /amine/; pK3 10.78 /sulfide/ |
| Collision Cross Section: | 149.57 Ų [M+H]+ [CCS Type: DT, Method: stepped-field]|151.34 Ų [M+Na]+ [CCS Type: DT, Method: stepped-field]|144.47 Ų [M-H]- [CCS Type: DT, Method: stepped-field]|113 Ų [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine]|144 Ų [M-H]- | Experimental Properties: | 100 (20 °C) g/100 g H2O /L-Cysteine hydrochloride monohydrate/|Hydroxyl radical reaction rate constant = 7.96X10-11cu cm/molecule-sec at 25 °C (est)”>Readily oxidizes to form a dimeric amino acid, cystine, in which the two cysteines are linked via a disulfide bridge, a common structural feature in proteins. Amino Acids and Proteins, D.M. Greenberg, Ed. (Charles C. Thomas, Springfield, IL, 1951) 950 pp.|In neutral or slightly alkaline aqueous solution it is oxidized to cystine by air. More stable in acidic solutions.|MP (anhydrous): 178 °C (decomposes). Specific optical rotation: +6.53 deg at 25 °C/D (calculated as cysteine) (c = 2 in 5M HCl); solubility >100 (20 °C) g/100 g H2O /L-Cysteine hydrochloride monohydrate/|Hydroxyl radical reaction rate constant = 7.96X10-11cu cm/molecule-sec at 25 °C (est) |
Classification of the substance or mixture
Acute toxicity – Category 4, Oral
GHS label elements, including precautionary statements
| Pictogram(s) |  |
|---|---|
| Signal word |
Warning |
| Hazard statement(s) |
H302 Harmful if swallowed |
| Precautionary statement(s) | |
| Prevention |
P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. |
| Response |
P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth. |
| Storage |
none |
| Disposal |
P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal. |
Other hazards which do not result in classification
no data available
Precautions for safe handling
Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Keep container tightly closed in a dry and well-ventilated place. Store under inert gas. Air sensitive. Storage class (TRGS 510): Non Combustible Solids.