Disodium distyrylbiphenyl disulfonate

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

By absorbing UV light and re-emitting it as visible blue fluorescence, it counteracts yellowing in treated materials without adding pigment. This mechanism is essential for maintaining high visual standards in industrial applications.

In pulp and paper manufacturing, it is applied during wet-end processing or surface sizing to boost sheet brightness and meet commercial print quality standards. This ensures a professional finish for high-end paper products.

Textile finishing operations use it in padding baths to achieve durable optical brightening on cotton and blended fabrics. It provides a consistent, brilliant white appearance that remains stable throughout the manufacturing process.

In packaging production, it improves the visual appeal of white paperboard and coated substrates where brand presentation is critical. This makes it a vital component for consumer-facing goods and luxury packaging solutions.

Personal care formulators incorporate it into detergent and fabric care products to deliver a brightening effect on laundered textiles. It helps maintain the original brightness of clothing over multiple wash cycles.

Disodium distyrylbiphenyl disulfonate is supplied as an aqueous solution, typically at concentrations ranging from 15% to 40% active content. Technical and industrial grades are the standard market offering for these sectors.

Specifications are aligned to paper, textile, and detergent end-use requirements. Packaging options commonly include drums and intermediate bulk containers suited to industrial procurement volumes and logistics.