L-Cysteine Food Grade
44 Inquiries
52-90-4
Food Grade
NINGBO
2017-04-27
L-CYSTEINE HCL MONO /ANHYDROUS,L-CYSTINE ,,L-TYROSIEN, L-LEUCINE., L-ARGININE ASPARTATE ,,L-TRYPTOPHAN,L-THREONINE N-ACETYL-L-CYSTEINE,N-ACETYL-L-TYROSINE
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Product Description
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Seller Information
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Inquiry History
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DescriptionMainly used in medicine, cosmetics, biochemical research and so on. Used in bread stock to promote the formation of gluten and promote fermentation, mold, and prevent aging. Used in natural fruit juices to prevent oxidation of vitamin C and prevent juices from becoming brown. It can be used as an antidote to acrylonitrile poisoning and aromatic acidosis. The product also acts as a preventive against radiation damaging the body and is also a cure for bronchitis, especially as expectorant drugs (mostly in the form of acetyl L- cysteine methyl ester salts). Cosmetics are mainly used for beauty water, perm liquid, anti sunburn skin cream, cream, etc.Basic Info
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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:
Characteristics-
PSA:
102.12000
XLogP3:-2.5
Appearance:DryPowder
Density: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: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)
Hazard IdentificationClassification 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
Handling and StoragePrecautions 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.
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Seller Information
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Business Type:
Manufactory
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Main Products:
L-CYSTEINE HCL MONO /ANHYDROUS,L-CYSTINE ,,L-TYROSIEN, L-LEUCINE., L-ARGININE ASPARTATE ,,L-TRYPTOPHAN,L-THREONINE N-ACETYL-L-CYSTEINE,N-ACETYL-L-TYROSINE
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Location:
629 zhenning east road zhenhai ningbo china
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Payment Terms:
TT against copy of documents,L/C,D/A
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Average lead Time:
60
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Total Annual Revenue:
$2.5 million-$5 million
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Total Employees:
11-50
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Year of Establishment:
1991
Ningbo Zhenhai Amino Acid Factory was established at the end of 1990. The factory is located on the coast of the beautiful East China Sea with convenient transportation. There are nearly 100 employees, the factory area is 10,000 square meters, the construction area is 5,000 square meters, and the fixed assets are 10 million yuan. With domestic advanced production equipment and testing capabilities, the annual production capacity of L-cysteine is 400 tons. The factory has strong technical force and ten technicians with intermediate level or above. It is one of the domestic professional manufacturers of cysteine series products. One. The main products of the factory are: 1, L-cysteine hydrochloride hydrate 2, L-cysteine hydrochloride anhydrous 3, L-cysteine 4, L-cystine 5, L- Leucine 6, L-tyrosine 7, L-arginine 8, L-arginine hydrochloride 9, L-histidine hydrochloride 10, L-isoleucine 11, L-va 12-L, threonine 13, L-ornithine hydrochloride 14, L-tryptophan 15, L-histidine 16, L-cysteine hydrochloride ethyl ester 17, L- Cysteine hydrochloride methyl ester 18, L-methionine 19, L-lysine base 20, L-lysine hydrochloride 21, L-alanine 22, L-proline 23 , L-serine 24, S-carboxymethyl-L-cysteine 25, N-ethyl ester-L-cysteine 26, N-ethyl ester-L-tyrosine 27, N-ethyl ester- L-leucine 28, DL-methionine 29, DL-tryptophan 30, DL-threonine 31, DL-isoleucine 32, DL-lysine 33, DL-valine 34, D- Tryptophan 35, D-threonine 36, D-methionine 37, D-isoleucine. All products of our factory comply with international standards such as Japanese Ajinomoto, American Pharmacopoeia, European Pharmacopoeia, and most of the products have obtained KOSHER certification. 99% of the products are exported and exported to Europe, the United States, Southeast Asia and other places. In recent years, the factory has been ranked ahead of its peers with high-quality products, good reputation, and good after-sales services. It has been rated as the key enterprise of foreign exchange earning in Zhejiang Province for three consecutive years and the largest enterprise in Zhejiang Province. In order to make the enterprise develop and grow continuously, the factory is currently cooperating with the scientific research departments of several domestic colleges and universities, and actively introducing talents, relying on scientific and technological strength, vigorously develop new amino acid products. Based on the concept of integrity and customer first, our factory hopes to establish good cooperative relations with friends and colleagues from all walks of life at home and abroad.
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Inquiry History44 Inquiries
Country Product Purchase Quantity Date Posted
India
L-cysteine
5.00 KG Dec 2, 2025
India
L-Cysteine
100.00 KG Jun 7, 2025
India
L-Cysteine
1.00 KG Nov 25, 2025
India
L-Cysteine
1.00 KG May 13, 2025
India
L-Cysteine
1.00 KG Oct 8, 2024
India
L Cyteine
25.00 KG May 21, 2026
India
L-Cysteine
100 KG Dec 17, 2025
India
L-Cysteine
1.00 MT Sep 26, 2023
India
L-Cysteine
20.00 MT Dec 13, 2023
India
L-Cysteine
1.00 KG Jan 28, 2026
India
L-Cysteine
2.00 KG Jan 27, 2026
Slovenia
L-CYSTEINE
400 KG Jan 20, 2026
Egypt
L-Cysteine
1000 KG Jan 19, 2026
India
L-Cysteine
1.00 KG Sep 8, 2025
Pakistan
L-Cysteine
50.00 KG May 6, 2025
India
L-Cysteine
1 MT Apr 23, 2025
India
L-Cystiene
10.00 KG Mar 26, 2025
India
L-Cysteine
1.00 KG Nov 14, 2024
India
L-Cysteine
1.00 KG Oct 28, 2024
India
L-Cysteine
10 KG Jun 11, 2024 Post an enquiry for this product