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Home > Food Additives > Nutrition Supplements > L-(+)-Cysteine for Sale > Largest factory Manufacturer Supply High Qulity L-Cysteine(base) CAS 52-90-4
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Largest factory Manufacturer Supply High Qulity L-Cysteine(base) CAS 52-90-4 buy - image1
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Largest factory Manufacturer Supply High Qulity L-Cysteine(base) CAS 52-90-4 buy - image5
Largest factory Manufacturer Supply High Qulity L-Cysteine(base) CAS 52-90-4 buy - image6

Largest factory Manufacturer Supply High Qulity L-Cysteine(base) CAS 52-90-4

47 Inquiries

Unit Price:

$9-11/KG FOB

Get Latest Price
CAS No.:

52-90-4

Grade:

Pharmaceutical Grade

Content:

99%

Port:

HK

Brand:

Shengyufan International Trade Co., Ltd.

Packaging:

sealed foil bag

Sample Available:

Yes

Price valid (until):

2027-12-31

Company Type:
Trader
Location:
China
Payment Terms:
TT against copy of documents,L/C,TT against B/L draft before shipment,100% TT in advance
Qualification:
Main Products:

Cosmetic raw material,API,Retatrutide,Tirzepatide,Semaglutide,intermediates

  • Product Description

  • Seller Information

  • Inquiry History

  • Description


    High Purity Wholesale L-Cysteine(base) Raw Powder with Best Price


    Shop High Quality Amino Acid L-Glutamic acid in bulk-Detailed Image 1


    Items Specifications
    Product name L-Cysteine(base)
    Specification 1kg/bag
    Appearance Powder

    Shop High Purity Research Peptide Powder 5mg Vial Retatrutide-Detailed Image 2

    Shop High Quality Amino Acid L-Glutamic acid in bulk-Detailed Image 3 Shop High Quality Amino Acid L-Glutamic acid in bulk-Detailed Image 4



      About us



    We are dedicated to providing high-quality amino acid in at favorable prices.our products exported to over 60 countries and regions around the world, such as the United States, the European Union, the Middle East, Southeast Aisa and South America.
    At the heart of our success is our dedication to building long-term partnerships based on trust, mutual respect, and shared success. Our team of experienced sales and technical professionals works closely with customers to provide personalized solutions, from product selection and customization to technical support and after-sales service. We offer flexible ordering options, competitive pricing, and reliable delivery to ensure that our customers receive the products they need when they need them. Our global distribution network is supported by strategic partnerships with good logistics providers, allowing us to ship products efficiently and safely to destinations around the world. Whether it's a small order or a large-scale shipment, we handle every transaction with the same level of care and attention to detail.

    Constantly strive for high quality products, competitive prices, professional support, effective team, honest cooperation, safe shipment and good after-sales work. Looking forward to build long-term relationship with you.Shop High Purity Research Peptide Powder 5mg Vial Retatrutide-Detailed Image 5

    Shop Most Professional Manufacturer Supply High Qulity Guanidineacetic Acid CAS 352-97-6-Detailed Image 6

    Shop High Purity Research Peptide Powder 5mg Vial Retatrutide-Detailed Image 7

    Shop Most Professional Manufacturer Supply High Qulity Guanidineacetic Acid CAS 352-97-6-Detailed Image 8



       Package and Delivery


    Product Packing: bag/box/drum,The packaging can be customized. the shipping way can be by sea, by air, or small quantity can be shipped by Express.

    Shipping Condition: Shipped under ambient temperature as non-hazardous chemical.


    1.High quality and competitive price.
    2.Promptly delivery by well-reputed shipping lines.
    3.Trial order is available for testing after samples.
    4.We will inform you all the information at every stage in advance.
    5.Packaging can gear to buyers' special request. 






    Shop High Quality Amino Acid L-Glutamic acid in bulk-Detailed Image 9

    Shop High Purity Research Peptide Powder 5mg Vial Retatrutide-Detailed Image 10

    Shop High Purity Research Peptide Powder 5mg Vial Retatrutide-Detailed Image 11



      FAQ


    Q1: Have your Product Quality been Approved by Third Party Lab?

    A: Yes, All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China. So you will be assured with Good Quality if you choose us.

    Q2: How to cooperate with us?

    You can contact us for cooperation through the website contact information, or contact with the salesmen in our company. We will connect you about the specific detail via email.

    Q3: Is there any discount?

    A: Yes, for larger quantity, we always support with better price.

    Q4: Do you accept VISA business credit card?

    A: Sorry we don't accept VISA credit card,
    We'd like to accept bitcoin, USDT, bank transferetc.

    Q5: How long does it take to the goods arrived?

    A:It is Depending on your location.
    For small order, please expect 5-7 days by DHL,UPS,TNT, FEDEX, EMS.
    For mass order, please allow 5-8 days by Air, 20-35 days by Sea.

    Q6: May I get one sample before placing order?

    Re: Yes, Sample are available. For normal products, samples are for free and you just need to bear the freight; For those high value products, you just need to freight and certain product cost. When we both cooperate for some times or when you are our VIP customer, free sample will be offered when you need.

    Q7: Do you have any reshipment policy ?

    We have good after-sale service and re-shipment policy if the parcel lose.
    Our long association with our clients has brought great benefits.
    We always take the upmost care in the packaging of our products .
    But in spite of our best efforts it is still possible will seize a small number of packages.
    In this circumstance we promise reship free to establish long term relationship.

    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:

    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 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 Identification

    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

    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.

  • Seller Information
    Business Type:

    Trader

    Main Products:

    Cosmetic raw material,API,Retatrutide,Tirzepatide,Semaglutide,intermediates

    Location:

    3-1-203 Green Home, No.1 Jianming South Road, Chang'an District, Shijiazhuang City, Hebei Province

    Payment Terms:

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

    Total Employees:

    5-10

    Year of Establishment:

    2025

  • Inquiry History
    47 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 Oct 8, 2024
    India

    L-Cysteine 

    1.00 KG May 13, 2025
    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

    25 KG Aug 26, 2026
    India

    L-Cysteine

    20.00 MT Dec 13, 2023
    India

    L-Cysteine

    300.00 KG Sep 4, 2026
    India

    L Cysteine

    25.00 KG Jul 30, 2026
    India

    L-Cysteine

    100 KG Jul 29, 2026
    Egypt

    L-Cysteine

    1.00 KG Jul 25, 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
    India

    L-Cysteine

    1.00 KG Sep 8, 2025
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