Description and features

Disodium-4-4-bis-2-sulfostyryl-biphenyl (Viobrite CBS) is a yellow free flowing fine granule which has the chemical formula C28H20O6S6Na2.
Viobrite CBS has a higher yield of whiteness than the classical stilbene type brighteners. It finds its application in houselhold detergents. Besides it is being used in coatings and textiles.

This substance is also known as Fluorescent Brightener FWA-5, Distyrylbiphenylsulfonate, Fluorescent Whitener CBS and FBA 351.


Europe and United States: Provided Viobrite CBS is on stock in our local warehouses our lead time is about one week if delivered in 25 KG cartons.

Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.

This substance (CAS: 248-421-0) has been registered (FULL SUBSTANCE) under REACH (EC) 1907/2006.

Product Identification

CAS number 27344-41-8
EC number 248-421-0
HS code 3204 20 00
Sensitivity Hygroscopic


Appearance Yellowish free flowing fine granule
Active content ≥95 %
1% E-value 1105 ~ 1181
Extinction value 0.829 – 0.885
Heavy metal Heavy metal
Ionic character Ionic
Maxim absorption wave length 348 ± nm
Moisture ≤ 5.00 %


Viobrite CBS is being used in the production of detergents, paint and coatings.


Available packaging: 25 KG cartons and 400 KG big bags.
Special packaging is available on request.


Store disodium-4-4-bis-2-sulfostyryl-biphenyl in a cool, dry and well-ventilated area and in line with legal requirements.
Keep CBS away from heat sources and oxidizing agents.


A Material Safety Data Sheets (MSDS) is available for Viobrite CBS and all other products supplied by Vesta Chemicals BV.

An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.

Molecular and structural information

Molecular formula C28H20O6S6Na2
Molecular weight 562.56 g/mol
Structural formula 27344-41-8

Physicochemical information

Autoignition 580 ºC
Bulk density 550 – 670 g/l
Density 1.49 g/cm3 (22 ºC)
Melting point >300 ºC
Partition coefficient (log Pow) -2.32 @ 25 ºC / pH 6.8
pH value 7 – 8.5
Solubility in water 17.6 g/l @ 20 ºC / pH 6.7
Disodium-4-4-bis-2-sulfostyryl-biphenyl | CAS: 27344-41-8 | Disclaimer. This information is supplied solely for informational purposes and Vesta Chemicals bv makes no guarantees or warranties, either expressed or implied, with respect to the accuracy and use of this data. All product warranties and guarantees shall be governed by the Standard Terms of Sale. Nothing in this document is legal advice or is a substitute for competent legal advice.