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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.

Product information

CAS number27344-41-8
EC number 248-421-0
HS code3204 20 00

Molecular and structural information

Molecular formulaC28H20O6S6Na2
Molecular weight562.56 g/mol
Smiles notationC1=CC=C(C(=C1)/C=C/C2=CC=C(C=C2)C3=CC=C(C=C3)/C=C/C4=CC=CC=C4S(=O)(=O)[O-])S (=O)(=O)[O-].[Na+].[Na+]
Structural formula:27344-41-8


AppearanceYellowish free flowing fine granule
1% E-value1105 ~ 1181
Maxim absorption wave length348 ± nm
Extinction value0.829 - 0.885
Moisture content≤ 5.00 %
Active content:≥95 %
Ionic characterIonic
Heavy metal content≤ 30 ppm

Physicochemical information

Autoignition 580 ºC
Bulk density550 - 670 g/l
Density1.49 g/cm3 (22 ºC)
Melting point>300 ºC
Partition coefficient (log Pow)-2.32 @ 25 ºC / pH 6.8
pH value7 - 8.5
Solubility in water17.6 g/l @ 20 ºC / pH 6.7

Viobrite CBS-X 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.

Shipment Info
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.

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.

This substance (CAS: 27344-41-8) has been pre-registered under REACH (EC) 1907/2006.

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

Disodium-4-4-bis-2-sulfostyryl-biphenyl: Disclaimer. This information is supplied solely for informational purposes and Vesta Intracon 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.