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L-Cysteine, Fermentation

Name: L-Cysteine, Fermentation
Brand: Weihe
SKU: pr2408051770
Price: 10 USD
Availability: InStock

TDS 45 Inquiries

Unit Price: Get Latest Price 

CAS No.:

52-90-4

Grade:

Food Grade

Content:

99.6%

Port:

Shanghai, Qingdao

Brand:

Weihe

Packaging:

25kg/box

Price valid (until):

2025-04-30

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Henan Weihe Biological Engineering Co.,Ltd.

Company Type:

Manufactory

Location:

China

Qualification:

Main Products:

N-Acetyl-L-Cysteine,L-Cysteine,L-Cysteine HCL Monohydrate,L-Cysteine HCL Anhydrous

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Product Description
Seller Information
Inquiry History

Description

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L-Cysteine Detail

It is mainly used in medicine, cosmetics, biochemical research, etc. It is used in bread materials to promote gluten formation and fermentation, demoulding, and prevent aging. It is used in natural fruit juice to prevent vitamin C oxidation and prevent the juice from turning brown. This product has a detoxifying effect and can be used for acrylonitrile poisoning and chemicalbook aromatic acid poisoning. This product also has the effect of preventing radiation damage to the human body and is also a drug for treating bronchitis, especially as an expectorant (mostly used in the form of acetyl L-cysteine methyl ester salt. In cosmetics, it is mainly used in beauty water, perm solution, sunscreen skin care cream, etc.

Items	Specifications
Assay	98.5- 101.0%
Loss on Drying	≤0 .5%
Residueonignition	≤0.10%
Description	White crystals or crystalline powder
Identification	Infrared absorption
State solution	≥99.0%
Chloride	≤1000ppm
Sulfate	≤0.03%
Heavy metals	≤10ppm
Other amino acids	≤0.5%
Agree with AJI92 standards

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Who we are

Weihe Biotech has Anhui Weihe production base, and Henan Weihe Biological Engineering Co.,Ltd. It is a national high-tech enterprise and a national technological innovation demonstration enterprise specializing in the research and development, production, and sale of fermented Amino acids and Vitamin nutritional fortifiers.
Company has strong technical force, has a reputation in the amino acid industry of technical experts and capable and efficient management team, the use of plant raw material fermentation method to produce a series of small varieties of amino acids. Its production process through green transformation and physical purification, without harmful chemical residues, the waste liquid wastewater produced through comprehensive utilization into waste into treasure, the formation of a circular industrial chain.

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What could we do

1. DO YOU ACCEPT SAMPLE ORDER?
Yes. We support sample orders for your trial production. And after the sample approved, we can negotiate for commercial order.

2. HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?
We support free sample, you only need to pay the shipping cost or arrange a courier to us and take the samples. We can also provide customized materials according to your specification demands.

3. WHAT'S YOUR MOQ?
Our don’t have MOQ restriction, even 1kg is available from us.

4. IS THERE A DISCOUNT?
Depends on the quantity you take. Different quantity has different discount.

Our Advantage

More Than 15 Years Experience
Our products are sold worldwide, like Europe, North&South America, Asia and pacific area as well as Africa, we are aiming to establish long term cooperation with our clients.

One-Stop Service

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. Customized product is also available from us.

7 DAYS 24 HOURS service

In time and clear response to customers questions. 100% guaranteed aftersales service, we are happy to provide guidance or solutions during your consumption.

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Certificates

Basic Info

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:

Nutrition Supplements

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 Å² [M+H]+ [CCS Type: DT, Method: stepped-field]|151.34 Å² [M+Na]+ [CCS Type: DT, Method: stepped-field]|144.47 Å² [M-H]- [CCS Type: DT, Method: stepped-field]|113 Å² [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine]|144 Å² [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)

See More L-(+)-Cysteine Properties 

Hazard Identification

Classification of the substance or mixture

Acute toxicity - Category 4, Oral

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Warning
Hazard statement(s)	H302 Harmful if swallowed
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 Storage

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.

See More L-(+)-Cysteine Safety Data Sheet 

Seller Information

Business Type:
Manufactory

Main Products:
N-Acetyl-L-Cysteine,L-Cysteine,L-Cysteine HCL Monohydrate,L-Cysteine HCL Anhydrous

Location:
Building 1, Greenland Binhu International city, South Unive

Payment Terms:
TT against copy of documents,L/C,TT against B/L draft before shipment,100% TT in advance

Average lead Time:
7

Total Annual Revenue:
$25 million-$50 million

Total Employees:
51-100

Year of Establishment:
2020

Henan Weihe Biological Engineering Co., Ltd. is a modern enterprise focusing on Research&Development and manufacture of Amino Acids and derivatives. Professional production of L-Cysteine, L-Cysteine Hydrochloride, N-Acetyl-L-Cysteine and other products. Henan Weihe, with a strict quality assurance system and has passed ISO 9001, as well as KOSHER and HALAL certification. Products confirm with the international and domestic quality standards, such as USP, BP, EP, AJI, FCC, etc.

Henan Weihe Biological Engineering Co., Ltd. relies on superb technical team, advanced production equipment, strict management system, fine manufacturing process, stable product quality, and has won the trust and praise of customers with its multi-variety management characteristics, more professional and modern praise.

Inquiry History

45 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

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L-Cysteine, Fermentation

Product Description

Seller Information