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4,4'-Bis-(2-sulfostyryl)-biphenyl disodium salt (BSBDS)

Formula C28H20Na2O6S2
CAS No. 27344-41-8
EC No. 248-421-0
Synonyms Disodium 2,2'-[biphenyl-4,4'-diyldiethene-2,1-diyl] dibenzenesulfonate;


4 4-Bis-(2-sulfostyryl)-biphenyl disodium salt (BSBDS) also known as Tinopal CBS, is a fluorescent whitening agent widely used in the textile industry to enhance the brightness and whiteness of fabrics. It works by absorbing ultraviolet light and re-emitting it as visible blue light, making fabrics appear brighter and more vibrant. BSBDS is particularly effective on cellulosic and synthetic fabrics and is known for its lightfastness, chlorine stability, and high solubility. 


In the world of dyes, it acts as a critical component in high-performance direct dyes for cotton and wool, offering excellent color depth and wash fastness. Beyond textiles, BSBDS plays a vital role in optical brighteners for paper, enhancing their whiteness and brightness. It even finds use in photoresists for the electronics industry, contributing to precise patterning during chip manufacturing. UniVOOK’s 4 4-Bis-(2-sulfostyryl)-biphenyl disodium salt (BSBDS) proves its versatility across diverse sectors, ensuring vibrant colors, superior brightness, and intricate patterns in various end products.


 Features: 4 4-Bis-(2-sulfostyryl)-biphenyl disodium salt (BSBDS)


Fluorescent Properties: 

BSBDS is known for its fluorescent homes, making it precious in packages where fluorescence is applied, which includes fluorescence microscopy and analytical chemistry strategies.

Fluorescence Labeling: 

Due to its capacity to emit fluorescence under particular conditions, BSBDS is generally used as a fluorescent label or tracer in organic and chemical assays. It is employed to visualize and quantify numerous materials in various experimental setups.

Analytical Chemistry: 

In analytical chemistry, BSBDS may be used as a fluorescent probe or indicator. Its fluorescence properties permit for touchy detection and quantification of goal materials, often in the area of spectrophotometry or fluorescence spectroscopy.

Biomedical Imaging: 

The compound has programs in biomedical imaging, where its fluorescent characteristics are harnessed for labeling and visualizing particular organic structures or molecules.

Dye Sensitization: 

BSBDS may be utilized in dye-sensitized sun cells or other optoelectronic devices in which its fluorescence properties contribute to the efficiency of energy conversion methods.


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​4,4′-Bis-(2-sulfostyryl)-biphenyl disodium salt (BSBDS) is an optical brightener (fluorescent whitening agent which absorbs UV radiation and re-emits visible blue light) which gives a bright neutral white shade to cellulosic and synthetic fabrics. It is lightfast, chlorine stable, highly soluble and achieves high level of whiteness and brightness from cold to medium washing temperature, even by short washing time.

mark Formulation Technologies - Textile Auxiliaries
mark Home Care - Laundry
mark Industrial and Institutional Cleaning - Commercial Laundry
mark Paper and Printing - Paper making, Coloration (paper)
mark Textiles and Leather - Drapery, fabric, textiles, fibres, Industrial Non-Wovens
Shelf Life

Under proper storage conditions the shelf life is 24 months.

Health & Safety

For more details and safety recommendations regarding the use of the product, please consult our Material Safety Data Sheet (MSDS), or Contact With our Product Manager.


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