Disodium 4,4'-Bis(2-sulfostyryl)biphenyl
CAS 27344-41-8
EC 248-421-0
Formula C28H22O6S2.2Na
MW 562.56 g/mol
Pigments & Colorants Pulp & PaperTextile, Leather & PaperPersonal Care & CosmeticsPrinting & Packaging Surface Modification & WettingAntioxidant & Stabilizer
Description
Disodium 4,4'-Bis(2-sulfostyryl)biphenyl, commercially known as Tinopal CBS, Tinopal CBS-X, Stilbene 3, and Stilbene 420, is a stilbene-based fluorescent whitening agent registered under CAS 27344-41-8 and EC 248-421-0. It absorbs UV light and re-emits it as visible blue-white fluorescence, counteracting yellowing in substrates.
In textile and paper processing, it is applied to cellulosic fibers and pulp to achieve measurable whiteness gains without bleaching chemistry, functioning through optical brightening rather than pigment masking. In personal care formulations, it serves as a skin-protective colorant and antioxidant stabilizer, contributing to product stability and appearance.
Supplied as a solid under HS code 29049090, this material is subject to REACH registration requirements for EU market supply. Procurement teams should confirm grade specification and purity documentation prior to ordering, as performance in end-use applications is sensitive to active content consistency.
In textile and paper processing, it is applied to cellulosic fibers and pulp to achieve measurable whiteness gains without bleaching chemistry, functioning through optical brightening rather than pigment masking. In personal care formulations, it serves as a skin-protective colorant and antioxidant stabilizer, contributing to product stability and appearance.
Supplied as a solid under HS code 29049090, this material is subject to REACH registration requirements for EU market supply. Procurement teams should confirm grade specification and purity documentation prior to ordering, as performance in end-use applications is sensitive to active content consistency.
Physical Properties
| Melting Point | >300°C (dec.) |
| Density | 1.414 |
| Color | Pale Green to Green |
| Form | Solid |
| Water Solubility | 17.6g/L at 20℃ |
| Log P | -2.32 at 25℃ |
Safety & Handling (Learn More)
Danger GHS05 GHS07
H
H318H319
P
P280P317P264+P265P337+P317P305+P351+P338P305+P354+P338
Trade & Regulatory
| HS Code | 29049090 |
Other Names
Disodium 4,4'-bis(2-sulfonatostyryl)biphenylBrightener BR 49Fluorescent Brightener cbs-XSTILBENE 3Tinopal CBSSTILBENE 420Tinopal CBS-XFluorescent Brightener 351
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Raw Materials
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