Fluorescent Brightener 353

Fluorescent Brightener 353 (CAS 55585-28-9), commercially known as Tinopal MSP, is a stilbene-triazine optical brightening agent used to enhance the perceived whiteness of substrates by converting UV light into visible blue-white fluorescence.

It is supplied as a water-soluble anionic compound suited to industrial whitening processes across textile, paper, and leather applications. In textile processing, it is applied during dyeing and finishing baths to boost whiteness.

This agent is effective on cotton, viscose, and blended fabrics without altering the base color. Paper manufacturers incorporate it into pulp slurries or surface sizing to meet brightness specifications required for printing and packaging grades.

Leather finishers use it in top-coat formulations to correct yellowish tones on finished hides destined for high-appearance goods. In printing and packaging, it improves substrate brightness to ensure accurate color reproduction.

The product ensures consistent print contrast on coated stocks and is typically available as a liquid solution or powder. Standard commercial concentrations for liquid grades vary by supplier for specific industrial needs.

Powder forms offer higher active content for dosing flexibility in large scale operations. It is supplied to technical and industrial-grade specifications, with documentation including purity assays and shade strength data.

These technical details are relevant to QA and procurement review for industrial buyers. The compound remains a staple for achieving high-performance whitening results across diverse manufacturing sectors and material types.