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Home > Pharmaceutical Intermediates > Bulk Drug Intermediates > 2,6-Di-tert-butyl-4-methylphenol for Sale > P21 | Cosmetic Peptides for Advanced Research| 99% Purity | Lyophilized Powder | hign quality
P21  | Cosmetic Peptides for Advanced Research| 99% Purity  | Lyophilized Powder | hign quality buy - large image1
P21  | Cosmetic Peptides for Advanced Research| 99% Purity  | Lyophilized Powder | hign quality buy - image1
P21  | Cosmetic Peptides for Advanced Research| 99% Purity  | Lyophilized Powder | hign quality buy - image2
P21  | Cosmetic Peptides for Advanced Research| 99% Purity  | Lyophilized Powder | hign quality buy - image3
P21  | Cosmetic Peptides for Advanced Research| 99% Purity  | Lyophilized Powder | hign quality buy - image4
P21  | Cosmetic Peptides for Advanced Research| 99% Purity  | Lyophilized Powder | hign quality buy - image5
P21  | Cosmetic Peptides for Advanced Research| 99% Purity  | Lyophilized Powder | hign quality buy - image6

P21 | Cosmetic Peptides for Advanced Research| 99% Purity | Lyophilized Powder | hign quality

COA TDS 20 Inquiries

Unit Price: Get Latest Price
CAS No.:

128-37-0

Grade:

Pharmaceutical Grade

Content:

99%

Port:

HONGKONG

Brand:

STTY

Packaging:

10via/kit

Price valid (until):

2026-07-05

Company Type:
Trader
Location:
China
Qualification:
Main Products:

Peptide

  • Product Description

  • Seller Information

  • Inquiry History

  • Description

    Contact us   Whatsapp: 

    +852 5384 5049   Justin



       Product Detail   


    Here is an English product overvied for p21    :

    Composition

    p21, formally known as Cyclin-Dependent Kinase Inhibitor 1A (CDKN1A), is a naturally occurring protein encoded by the CDKN1A gene located on human chromosome 6.
    It consists of a specific sequence of 164 amino acids and is structurally characterized as an intrinsically disordered protein, meaning it lacks a single, stable three-dimensional structure in its free state.
    This structural flexibility allows it to adapt and bind to various molecular targets with high specificity.

    Mechanism of Action

    Functioning as a fundamental cell cycle regulator, p21 operates primarily as a negative regulator to control cellular proliferation and genomic stability. Its core mechanisms include:
    • Cyclin-CDK Complex Inhibition: p21 binds directly to Cyclin-Cyclin-Dependent Kinase (CDK) complexes. This binding blocks the kinase activity of the complex, preventing the phosphorylation of the Retinoblastoma (Rb) protein. Consequently, the cell cycle is arrested at the G1 phase, effectively halting DNA replication.
    • PCNA Interaction: p21 interacts with Proliferating Cell Nuclear Antigen (PCNA), a cofactor for DNA polymerase. By binding to PCNA, p21 inhibits DNA synthesis, which is critical for allowing time for DNA damage repair or initiating cellular senescence.
    • p53 Pathway Mediation: It acts as a primary downstream effector of the p53 tumor suppressor protein. When cells detect DNA damage, p53 activates p21 expression to coordinate the cellular stress response.

    Research Advantages

    p21 is a pivotal molecule in molecular biology, oncology, and gerontology due to its central role in maintaining cellular integrity:
    • Tumor Suppression: It serves as a critical biomarker for evaluating the integrity of tumor suppressor pathways. Its expression levels are used to assess the potential for tumor differentiation, metastasis, and prognosis in various malignancies, including lung and breast cancer.
    • Cellular Senescence Indicator: p21 is a hallmark marker for cellular aging. It is extensively utilized in research to study the mechanisms of senescence and to develop strategies for clearing aged cells to improve tissue function.
    • Therapeutic Target: Due to its ability to arrest cell proliferation, p21 is a key subject in the development of cancer therapies and strategies for managing age-related chronic diseases

    Applicable Contexts

    p21 is exclusively utilized in controlled biomedical research and clinical pathology.
    Its applications include the investigation of cancer biology, the study of genetic stability and DNA repair mechanisms, and the analysis of cellular aging processes.
    In clinical diagnostics, the expression of p21 is assessed via immunohistochemistry to evaluate tumor characteristics and patient prognosis.





    Shop ronchogen High Quality China Factory Supply Peptides Powder Bronchogen for Scientific Research-Detailed Image 1



    Shop ronchogen High Quality China Factory Supply Peptides Powder Bronchogen for Scientific Research-Detailed Image 2 Shop ronchogen High Quality China Factory Supply Peptides Powder Bronchogen for Scientific Research-Detailed Image 3 Shop ronchogen High Quality China Factory Supply Peptides Powder Bronchogen for Scientific Research-Detailed Image 4 Shop ronchogen High Quality China Factory Supply Peptides Powder Bronchogen for Scientific Research-Detailed Image 5 Shop ronchogen High Quality China Factory Supply Peptides Powder Bronchogen for Scientific Research-Detailed Image 6




    Basic Info



       Items Specifications
    Product  Name P21
    CAS number 128-37-0
    Purity 99%
    Appearance White or almost white powder
    Storage Dry and Cool Place

    Grade Standard

    Top Quality

    Grade Pharmaceutical Grade
    Specification 5mg 10mg 20mg


      Our Company  


    Our company is a modern advanced enterprise specializing in production and exportation of APIs, Pharmaceutical intermediates, plant extracts etc. Our products are widely used in medicine, health care products, cosmetics, nutritional supplements and food additives areas. Our factory covers an area of 95 acres, the proposed construction of the plant will be GMP standards, the factory environment clean and tidy, rational layout, with large and medium-sized production workshop and repocessed shop. It is equipped with advanced equipment quality inspection and research center. Those products of both quality and technical content have reached the domestic advanced level. Since its establishment, the company has attached great importance to the team training and technical reform. Our modern production equipment guarantees for a fast and effective production with a superior degree of accuracy throughout the whole production line, everything is done in-house, processing, extraction, packaging and transportation of all links, ensuring maximum quality and efficiency. We are constantly research and development new ingredients and innovative new products, have earned the respect & Admiration from the worldwide customers. After years of continuous development, company has been accumulated rich experience in international trade and customer resources, established a stable customer base and perfect marketing service network. In addition, the company has established long-term technical cooperation with experts and professors from many universities and research institutes in the province.

    When storing peptides, remember to:
    • Store peptide in a cold, dry, dark place
    • Avoid repeated freezing and thawing of peptide
    • Avoid overexposure to the air
    • Avoid light exposure
    • Avoid storing peptides in solution long term
    • Aliquot peptide according to experimental requirements


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      Why choose us  


    Our Advantages:

    1.High quality with competitive price.

    2. All purity>99%.

    3. We are manufacturer and can provide high quality products with factory price.

    Fast and safe delivery.

    1. Parcel can be sent out in 24 hours after payment tracking number available.

    2. Secure and discreet shipment verious transportation methods for your choice.

    3. Customs pass rate >99%.

    We have clients throughout the world.

    1. Professional service and rich experience make customers feel at ease, adequate stock and fast delivery meet their different desire.

    2. Market feedback and goods feedback will be appreciated, meeting customers’ requirement is our principal responsibility.

    3. High quality, competitive price, fast delivery, first-class service gain the trust and praise from all the customers.

    Shop ronchogen High Quality China Factory Supply Peptides Powder Bronchogen for Scientific Research-Detailed Image 13

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      FAQ   


    1. How to make an order?
    Send me message and let me know what you need with quantity , then i will calculate to you

    2. What's the lead time and shipping ways?
    We will delivery to the package by UPS, FEDEX, DHL paket and YANWEN express to you after receive your payment, it would take around 5-15 days to your address.

    3. How do i keep the peptides when i receive it ?
    Peptides in the form of lyophilized powder can be transported at room temperature by vacuum packaging, while polypeptides in the dissolved state need to be refrigerated at 2°C - 8°C. For long-term storage, peptides should be stored in the form of lyophilized powder store at -20°C or -80°C in a sealed container with desiccant, which can avoid the degradation of peptides to the greatest extent.

    4. What's the payment methods?
    We could accept pay through Wise, Bank Transfer, Alipay,Alibaba USDT and BTC.


    Certificates
    • P21  | Cosmetic Peptides for Advanced Research| 99% Purity  | Lyophilized Powder | hign quality Certificates 2

    Basic Info
    Product Name:

    2,6-Di-tert-butyl-4-methylphenol

    Other Name:

    Phenol,2,6-bis(1,1-dimethylethyl)-4-methyl-;p-Cresol,2,6-di-tert-butyl-;2,6-Bis(1,1-dimethylethyl)-4-methylphenol;CAO 1;CAO 3;Dalpac;DBPC;Deenax;2,6-Di-tert-butyl-p-methylphenol;4-Hydroxy-3,5-di-tert-butyltoluene;Impruvol;Ionol;Ionole;4-Methyl-2,6-di-tert-butylphenol;Parabar 441;Sustane BHT;Tenamene 3;Topanol OC;Vianol;BHT;Butylated hydroxytoluene;Topanol O;Topanol;Dibunol;Nonox TBC;AO 4K;Dibutylated hydroxytoluene;Ionol 1;Buks;2,6-Di-tert-butylcresol;Stavox;Di-tert-Butyl-4-methylphenol;o-Di-tert-butyl-p-methylphenol;Di-tert-butyl-p-cresol;Antioxidant KB;2,6-Di-tert-butyl-p-cresol;Antioxidant 4K;Sumilizer BHT;Di-tert-butylcresol;Catalin CAO 3;Chemanox 11;Vanlube PCX;Vanlube PC;Advastab 401;2,6-Di-tert-butyl-p-cresole;Antioxidant 29;AO 29;Antioxidant 30;P 21;Antioxidant DBPC;Agidol;Alkofen BP;Kerabit;Agidol 1;AO 4;Vulkanox KB;2,6-Di-tert-butylmethylphenol;Nocrac 200;2,6-Di-tert-butyl-4-hydroxytoluene;2,6-Di-tert-butyl-4-methyl-1-hydroxybenzene;Ionol BHT;AOX 4;AOX 4K;Antioxidant 4;Tenox BHT;Topanol BHT;Swanox BHT;2,6-Di-tert-butyl-4-methylhydroxybenzene;Antioxidant 264;Vanox PC;Antage BHT;3,5-Di-tert-butyl-4-hydroxytoluene;Popol;Ralox BHT;Permanax BHT;Antioxidant MPJ;Topanol OL;Naugard BHT;2,6-Di-tert-butyl-p-cresol;BAT;Ultranox 226;Lubrizol 817;2,6-Di-tert-butyl-4-methylphenol;P 21 (phenol);T 501;Ionol 330;Yoshinox BHT;2,6-Bis(tert-butyl)-4-methylphenol;36631-28-4;42615-30-5;50356-19-9;50641-99-1;52683-46-2;53571-70-3;58500-82-6;83047-16-9;97123-41-6;102962-45-8;259752-53-9;290348-23-1;338986-13-3;1394965-02-6;1456709-94-6;1847425-90-4;2055662-96-7

    CAS No.:

    128-37-0

    UN No.:

    3077

    Molecular Formula:

    C15H24O

    InChIKeys:

    InChIKey=NLZUEZXRPGMBCV-UHFFFAOYSA-N

    Molecular Weight:

    220.35000

    Exact Mass:

    220.35

    EC Number:

    246-911-9

    HScode:

    2907199090

    Characteristics
    PSA:

    20.23000

    XLogP3:

    5.3

    Appearance:

    White crystals or crystalline powder

    Density:

    1.048 g/cm3 @ Temp: 20 °C

    Melting Point:

    70 °C

    Boiling Point:

    265 °C

    Flash Point:

    127ºC

    Refractive Index:

    1.4859

    Water Solubility:

    H2O: insoluble

    Storage Conditions:

    0-6ºC

    Vapor Pressure:

    <0.01 mm Hg ( 20 °C)

    Vapor Density:

    7.6 (vs air)

    Flammability characteristics:

    Class IIIB Combustible Liquid: Fl.P. at or above 200°F.

    Hazard Identification

    Classification of the substance or mixture

    Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 1

    GHS label elements, including precautionary statements

    Pictogram(s)
    Signal word

    Warning

    Hazard statement(s)

    H410 Very toxic to aquatic life with long lasting effects

    Precautionary statement(s)
    Prevention

    P273 Avoid release to the environment.

    Response

    P391 Collect spillage.

    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

    NO open flames. 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

    Separated from strong oxidants and strong bases. Well closed.Keep container tightly closed in a dry and well-ventilated place. Storage class (TRGS 510): Non Combustible Solids.

  • Seller Information
    Business Type:

    Trader

    Main Products:

    Peptide

    Location:

    Room 1501, Building 1, Changnan Mansion, Country Garden, on the west side of Taoyang North Road

    Payment Terms:

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

    Average lead Time:

    11

    Year of Establishment:

    2025

  • Inquiry History
    20 Inquiries
    Country Product Purchase Quantity Date Posted
    India

    Butyl hydroxy Toluene

    500.00 KG Feb 12, 2026
    Poland

    BHT (Butylated Hydroxytoluene)

    1000.00 KG Jan 21, 2026
    Pakistan

    Butylated Hydroxytoluene

    5 KG Jan 5, 2026
    India

    Butylated hydroxytoluene

    20 MT Jan 4, 2025
    Egypt

    Butylated hydroxytoluene(BHT)

    1.00 TON Dec 25, 2024
    Germany

    Butylated Hydroxytoluene

    10 KG Nov 21, 2024
    Pakistan

    Butylated Hydroxytoluene

    5000 KG Feb 5, 2024
    India

    2,6 Di Tert Butyl P-Cresol

    1 KG Sep 30, 2023
    India

    butylated hydroxy toluene

    1500 KG May 12, 2026
    United States

    P21

    10 PCS Mar 20, 2026
    India

    4 Butylated tolune(BHT)

    10.00 KG Dec 19, 2025
    Pakistan

    bht

    20 KG May 19, 2025
    United States

    Butylated hydroxytoluene

    5 MT Jun 26, 2024
    South Korea

    BUTYLATED HYDROXYTOLUENE

    1 20' Fcl Jun 5, 2024
    Pakistan

    Butylated hydroxytoluene Food Grade best selling

    12 MT Nov 8, 2023
    United States

    Top Quality p21 Butylated Hydroxytoluene 99% white powder junjia

    1 MT Oct 20, 2023
    Mexico

    Butylated Hydroxytoluene

    1000 KG Sep 29, 2024
    Morocco

    Inhibiteur Butylated hydroxytoluene (BHT)

    500 KG Sep 11, 2023
    United States

    Butylated Hydroxytoluene CAS NO. 128-37-0 99% powder

    5 MT Jun 26, 2024
    Hongkong, China

    Paraffin wax

    10 G Aug 5, 2025
    Post an enquiry for this product
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