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Food Grade 99%Pure Amino Acid Powder Free Sample L-Cysteine Base Powder L- (+) -Cysteine

Name: Food Grade 99%Pure Amino Acid Powder Free Sample L-Cysteine Base Powder L- (+) -Cysteine
Brand: Fulecare
SKU: pr2607031875
Price: 30 USD
Availability: InStock

51 Inquiries

Unit Price: Get Latest Price 

CAS No.:

52-90-4

Grade:

Pharmaceutical Grade

Content:

99%

Port:

xian

Brand:

Fulecare

Packaging:

Double plastic bags plus aluminum foil bag

Price valid (until):

2026-08-03

Contact Supplier

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Fulecare

Company Type:

Trader

Location:

China

Payment Terms:

L/C,TT against B/L draft before shipment,100% TT in advance

Average Lead Time:

335 days

Qualification:

Main Products:

Slu-pp-332,BAM 15

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Product Description
Seller Information
Inquiry History

Description

Product Detail

Shop Factory Supply Bam 15 Powder Bam 15 210302-17-3-Detailed Image 1

Produsts Name	L-Cysteine Powder
CAS No	52-90-4
Purity	>99%
Appearance	White powder
storage	keep in a cool,dark location in a tightly sealed container or cylinder.
Shelf Life	24 Months

L-Cysteine Base is widely used in the fields of food processing and biological study. It's used as a raw material for manufacturing N-Acetyl-L-Cysteine and S-Carboxymethyl-L-Cysteine, etc., and for bread making and cosmetics.

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Xi’an Fulecare biotech has high-technique enterprises with 10 years history,dedicate to separation, purification of the natural active ingredients production and sales.

We also produce international frontier dietary supplements such as granulated powder,solid drinks,tea sachets, capsules and tablets etc.

We have high grade clean workshop,800 square meters of inspection center equipped with more than 10 sets of HPLC,GC,IR,MASS instruments,these provides a full range of quality assurance to our products

The company has a perfect quality assurance system.We implement strict quality control standards and have passed the certification for the ISO9001 Quality Management System. The Quality Management Department is equipped with many sets of high performance liquid chromatography (HPLC)instruments, ultraviolet spectrophotometers (UV), several spectropolarimeters, a gas chromatograph (GC), melting point apparatus, and other advanced testing and experimental equipment. We make a detailed division of labor for technology research, and for quality assurance and quality control, so that we can conduct effective and comprehensive quality control in the production process. This also allows us to make comprehensive detection analysis of final products, thus ensuring products quality.

Our Services

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Packaging & Shipping

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DHL	Around 3-5 working days
Fedex	Around 4-6 working days
UPS	Around 4-6 working days
By Air	Around 5-7 working days
By Sea	Around 15-30 working days

Package

Powder:1kg per bag,25kg per Carton or Drum

PE bag, glass bottle, or PTFE bottle for inner packing, and aluminum foil bag for outer packing.

Liquid: glass bottle or PTFE bottle for inner packing, and aluminum foil bag for outer packing.

Bulk order: Fiber drum or steel drum.

Payment options

T/T,Paypal,Visa,L/C or according to your needs.

Transportation

UPS,TNT,EMS,Fedex,and so on.According to your location, safe customs clearance, generally delivered to your door within 3-7 days in Europe and the United States.

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ECHEMI Editorial Reference

L-Cysteine is a thiol-containing non-essential amino acid that is oxidized to form cystine.
DryPowder|Solid|White crystals; Sulferous aroma
L-cysteine is an optically active form of cysteine having L-configuration. It has a role as a flour treatment agent, a human metabolite and an EC 4.3.1.3 (histidine ammonia-lyase) inhibitor. It is a serine family amino acid, a proteinogenic amino acid, a cysteine and a L-alpha-amino acid. It is a conjugate base of a L-cysteinium. It is a conjugate acid of a L-cysteinate(1-). It is an enantiomer of a D-cysteine. It is a tautomer of a L-cysteine zwitterion.|A thiol-containing non-essential amino acid that is oxidized to form cystine.|Acetylcysteine, also known as N-acetylcysteine (NAC), is a modified amino acid that is used as an antidote for acetaminophen overdose to prevent hepatic injury. Acetylcysteine is a hepatoprotective agent and has not been linked to significant serum enzyme elevations during therapy or to instances of clinically apparent acute liver injury.|Cysteine is a non-essential sulfur-containing amino acid in humans, related to cystine, Cysteine is important for protein synthesis, detoxification, and diverse metabolic functions. Found in beta-keratin, the main protein in nails, skin, and hair, Cysteine is important in collagen production, as well as skin elasticity and texture. Also required in the manufacture of amino acid taurine, Cysteine is a component of the antioxidant glutathione, and plays a role in the metabolism of essential biochemicals such as coenzyme A, heparin, and biotin. (NCI04)|A thiol-containing non-essential amino acid that is oxidized to form CYSTINE.

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:

Bulk Drug Intermediates

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:
Trader

Main Products:
Slu-pp-332,BAM 15

Location:
No. 11608, 16th Floor, Unit 1, Building 1, West of Zhangba Liu Road, South Third Ring Road, High tech Zone, Xi'an City, Shaanxi Province

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

Average lead Time:
335 days

Total Annual Revenue:
$5 million-$10 million

Total Employees:
11-50

Year of Establishment:
2025

Inquiry History

51 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	Jul 14, 2026
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 - CYSTINE	25.00 KG	Aug 26, 2026
India	L-Cysteine	1.00 MT	Sep 26, 2023
India	L-Cysteine	25 KG	Aug 26, 2026
India	L-Cysteine	20.00 MT	Dec 13, 2023
India	L-Cysteine	300.00 KG	Sep 4, 2026
Egypt	L-Cysteine	1.00 KG	Jul 25, 2026
India	L-Cysteine	500 G	May 22, 2026
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
Pakistan	L-Cysteine	50.00 KG	May 6, 2025

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Food Grade 99%Pure Amino Acid Powder Free Sample L-Cysteine Base Powder L- (+) -Cysteine

Product Description

Seller Information

Inquiry History

Classification of the substance or mixture

GHS label elements, including precautionary statements

Other hazards which do not result in classification

Precautions for safe handling

Conditions for safe storage, including any incompatibilities

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