Disodium distyrylbiphenyl disulfonate

Disodium distyrylbiphenyl disulfonate (CAS 27344-41-8), commercially known as Brightener BR 49, is a stilbene-based optical brightening agent that enhances the perceived whiteness and brightness of substrates.

Where is Disodium distyrylbiphenyl disulfonate used?

• Pulp and paper: applied during wet-end processing or surface sizing to boost sheet brightness and meet commercial print quality standards
• Textile finishing: in padding baths for durable optical brightening on cotton and blended fabrics
• Packaging: improves the visual appeal of white paperboard and coated substrates
• Detergent and fabric care: brightening effect on laundered textiles
• By absorbing UV light and re-emitting it as visible blue fluorescence, it counteracts yellowing in treated materials without adding pigment.

Commercial specifications

• Aqueous solution, typically 15% to 40% active content
• Specifications aligned to paper, textile, and detergent end-use requirements
• Packaging commonly includes drums and intermediate bulk containers