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Home > Catalyst and Auxiliary > Fluorescent Brightener > 2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene for Sale > Fluorescent Whitening Agent OB High Purity Optical Brightener CAS 7128-64-5 Industrial Grade for Plastics and Coatings
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Fluorescent Whitening Agent OB High Purity Optical Brightener CAS 7128-64-5 Industrial Grade for Plastics and Coatings

TDS 7 Inquiries

Unit Price:

$30-35/KG FOB

Get Latest Price
CAS No.:

7128-64-5

Grade:

Reagent Grade

Content:

99%

Port:

qingdao

Brand:

//

Packaging:

1g/vial, 5g/vial, 25g/vial, 100g/vial

Sample Available:

Yes

Price valid (until):

2026-11-08

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

Medetomidine,Medetomidine hydrochloride,D-Lysergic Acid Methyl Ester,SR17018,Fluralaner,GS-441524

  • Product Description

  • Seller Information

  • Inquiry History

  • Description

    —— Product Specifications ——


    Shop Fluorescent Whitening Agent OB High Purity Optical Brightener CAS 7128-64-5 Industrial Grade for Plastics and Coatings-Detailed Image 1

    —— Product Detail ——

    • Product Overview

      Fluorescent Whitening Agent OB (also known as Optical Brightener OB) is an organic compound with the molecular formula C₂₆H₂₆O₂S and molecular weight of 430.56 g/mol. This light yellow to yellow crystalline powder is a widely used optical brightener in plastics, coatings, and synthetic fibers. The compound absorbs ultraviolet light and emits blue fluorescence, making materials appear whiter and brighter.

      Synthetic Process

      • Synthesis: The compound is synthesized through a multi-step process involving the condensation of benzoxazole derivatives with sulfonyl chlorides

      • Purification: The crude product is purified by recrystallization from suitable solvents

      • Drying: The purified product is dried under vacuum

      Mechanism of Action

      • UV Absorption: Absorbs ultraviolet light in the 300-400 nm range

      • Blue Fluorescence: Emits blue fluorescence in the 400-500 nm range

      • Color Compensation: Compensates for the yellowing of materials by adding blue light

      Research Applications & Market Significance

      • Plastics: Used as an optical brightener in PVC, PS, ABS, and other polymers

      • Coatings: Used in paints, inks, and coating formulations

      • Synthetic Fibers: Used in polyester, nylon, and acrylic fibers

      • Detergents: Used in laundry detergents and fabric softeners

      Quality Specifications

      • Purity: ≥99.0% determined by HPLC

      • Melting point: 196-199°C

      • Loss on drying: ≤0.5%

      • Storage: 2-8°C, sealed, protected from light

      • Stable for 36 months when properly stored

      Packaging & Shipping

      • Research quantities: 100g, 500g amber glass bottles

      • Bulk quantities: 1kg, 5kg fiber drums

      • Shipped at ambient temperature


    — C ompany Profile ——


     ,

    Shop Amberlite IR-120 Cation Exchange Resin Sodium Form CAS 9002-23-7 High Purity Strong Acid Cation Exchange Resin for Water Softening, Demineralization,-Detailed Image 2

    Jinan Topfull Chemical Co., Ltd. is an international company rooted in China, specializing in the export of chemical products.

    Our company is committed to making every effort to provide ideal chemical products to potential customers worldwide, including but not limited to: organic/inorganic reagents, biological reagents, plant extracts, pharmaceutical intermediates, active pharmaceutical ingredients (APIs), reference standards, reference substances, peptides, and more. Meanwhile, we have established long-term and stable cooperative relationships with university laboratories and off-campus research institutions, enabling us to offer tailored product services based on customers' actual needs.

    We currently support customized services for most product categories, with supply quantities ranging from milligram (mg), gram (g) to kilogram (kg) levels, as well as wholesale. Product purity covers the full spectrum from 90% to 99.9%, providing customers with one-stop convenient services.

    To date, our products have been exported to developed countries such as the United States, Australia, Canada, Mexico, as well as EU member states including France, Germany, and many other countries and regions such as Nigeria, Ghana, Southeast Asia, and other parts of Asia. Our product quality and services have consistently received high praise.

    Looking ahead, our company will continue to serve as a bridge connecting China and the world, delivering high-quality products and services to global customers.

     

    Shop Amberlite IR-120 Cation Exchange Resin Sodium Form CAS 9002-23-7 High Purity Strong Acid Cation Exchange Resin for Water Softening, Demineralization,-Detailed Image 3

    Shop Amberlite IR-120 Cation Exchange Resin Sodium Form CAS 9002-23-7 High Purity Strong Acid Cation Exchange Resin for Water Softening, Demineralization,-Detailed Image 4 

    —— Q&A ——

    Q1: How to confirm the product quality before placing orders?
    A: By sending you available samples. Or if you have special requirements for the goods, we can prepare samples according to your requirements for confirmation.

    Q2: Can you supply free samples?
    A: Yes, we can provide a free sample, but the shipping cost will be paid by the customers. You can either pay the shipping cost or arrange a courier to collect the samples.

    Q3: How do you treat quality complaints?
    A: All our products are strictly tested by our QC and confirmed by QA; unqualified material will not be released to customers. If any quality problem is confirmed to be caused by us, we will replace the goods or refund your payment immediately.

    Q4: What is your MOQ? Is there a discount?
    A: For highvalue products, our MOQ starts from 1g and generally starts from 10g. For other lowprice products, our MOQ starts from 100g and 1kg.
    Q: Is there a discount?
    A: Yes, for larger quantities, we always support with better prices.

    Q5: How to start orders or make payments?
    A: You can send us your Purchase Order (if your company has one), or just send a simple confirmation by email or via Trade Manager. We will then send you a Proforma Invoice with our bank details for your confirmation, and you can make payment accordingly. If you have other preferred payment methods, we are open to discussion and negotiation.



    ECHEMI Editorial Reference
    light yellow-green crystals
    DryPowder; OtherSolid

    Certificates
    • Fluorescent Whitening Agent OB High Purity Optical Brightener CAS 7128-64-5 Industrial Grade for Plastics and Coatings Certificates 1 TDS

    Basic Info
    Product Name:

    2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene

    Other Name:

    Benzoxazole,2,2′-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-;Benzoxazole,2,2′-(2,5-thiophenediyl)bis[5-tert-butyl-;2,2′-(2,5-Thiophenediyl)bis[5-(1,1-dimethylethyl)benzoxazole];2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene;2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene;2,2′-(2,5-Thiophenediyl)bis[5-tert-butylbenzoxazole];BBOT;2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene;Uvitex OB;BBOT 150;Uvitex 3BSA;C.I. Fluorescent Brightening Agent 184;C.I. Fluorescent Brightener 184;C.I. 515245;Fluorescent Brightener 184;Keyfluor White PL;O-B TECH;Uvitex OB 55;NSC 158163;C.I. FBA 184;OB;TBO;2,5-Bis(5-tert-butylbenzooxazol-2-yl)thiophene;Tinopal OB;B 0047;OB-FBA 184;Hitex OB;Brightener OB;MPI Bright 100;Benetex OB;Helios SC;SpeedBright OB 184;OB 184;Fluorescent brightener OB;2,2′-(2,5-Thiophenediyl)bis(5-tert-butylbenzoxazole);S-FN;Telalux OB;Tinopal OB-CO;Mayzo OB Plus;Benetex OB+;Benetex OB Plus;12224-40-7;59249-63-7;61229-63-8;144470-46-2;864446-12-8;1197996-34-1;1430334-83-0;2369674-07-5

    CAS No.:

    7128-64-5

    Molecular Formula:

    C26H26N2O2S

    InChIKeys:

    InChIKey=AIXZBGVLNVRQSS-UHFFFAOYSA-N

    Molecular Weight:

    430.56

    Exact Mass:

    430.56

    BRN:

    631803

    EC Number:

    230-426-4

    UNII:

    W7UR9129GP

    NSC Number:

    158163

    DSSTox ID:

    DTXSID1048205

    HScode:

    2934999090

    Characteristics
    PSA:

    80.3

    XLogP3:

    8.98

    Appearance:

    DryPowder; OtherSolid

    Density:

    1.2±0.1 g/cm3

    Melting Point:

    201-202 °C

    Boiling Point:

    531.2°C at 760 mmHg

    Flash Point:

    >350°C

    Refractive Index:

    1.617

    Water Solubility:

    soluble in acetone and toluene. Insoluble in water.toluene: soluble 50mg/mL

    Storage Conditions:

    Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

    Toxicity:

    Oral-rat LD50: >10000 mg/kg

    Flammability characteristics:

    Flammable; burning produces toxic nitrogen oxides and sulfur oxide fumes

    Hazard Identification

    Classification of the substance or mixture

    Not classified.

    GHS label elements, including precautionary statements

    Pictogram(s) No symbol.
    Signal word

    No signal word

    Hazard statement(s)

    none

    Precautionary statement(s)
    Prevention

    none

    Response

    none

    Storage

    none

    Disposal

    none

    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

    Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

  • Seller Information
    Business Type:

    Trader

    Main Products:

    Medetomidine,Medetomidine hydrochloride,D-Lysergic Acid Methyl Ester,SR17018,Fluralaner,GS-441524

    Location:

    RONGSHENG BEIYUANDAJIE 9, LICHENG DISTRICT,JINAN, SHANDONG CHINA

    Payment Terms:

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

    Average lead Time:

    7 days

    Total Annual Revenue:

    $1 million-$2.5 million

    Total Employees:

    11-50

    Year of Establishment:

    2022

    Jinan Topfull Chemical Co., Ltd. is a global chemical Industrial and focuses on advanced chemical technology. Specialized in Cosmetic materials, water treatment, fine chemicals and so on. We are looking forward to working together with the people of all circles at home and abroad to seek common development!
  • Inquiry History
    7 Inquiries
    Country Product Purchase Quantity Date Posted
    India

    OPTICAL BRIGHTENER OB

    1.00 MT Nov 22, 2023
    India

    Fluorescent Brightener 184      

    25.00 KG Jan 15, 2024
    Poland

    2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene

    20 G Dec 3, 2024
    Poland

    2,5-thiophenediylbis(5-tert-butyl-1,3-benzoxazole)

    20 G Dec 3, 2024
    India

    OPTICAL BRIGHTENER OB

    200.00 KG Oct 16, 2023
    India

    OPTICAL BRIGHTENER FP127

    1.00 MT Nov 22, 2023
    India

    Fluorescein

    10.00 KG Nov 22, 2023
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