Description

Hexasodium 4,4'-Bis[[4,6-Bis(m-Sulphonatoanilino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance, multi-sulfonated fluorescent whitening agent (FWA) of the stilbene-triazine class, primarily used to impart a brilliant white appearance to materials by absorbing ultraviolet light and re-emitting it as visible blue light. Its exceptional brightening efficiency and substantivity make it a critical additive in industries where superior whiteness and color correction are paramount. This compound is essential for manufacturers in the detergent, paper, textile, and plastics sectors seeking to enhance the aesthetic appeal and perceived cleanliness of their products.

Application

• Detergent & Laundry Care: As a key optical brightener in laundry detergents, fabric softeners, and soaps to compensate for fabric yellowing and deliver a visually "whiter-than-white" finish.
• Paper Manufacturing: Used in the coating and pulp of high-quality papers, including photographic, writing, and printing papers, to achieve high brightness and opacity.
• Textile Finishing: Applied in the finishing baths for cotton, nylon, and other fibers to improve whiteness, especially for materials that have been bleached.
• Plastics & Synthetic Fibers: Incorporated into polymers, synthetic fibers (like polyamide), and masterbatches to correct yellowness and enhance the brightness of the final molded products.
• Personal Care Products: Utilized in certain cosmetics and personal care items, such as soaps and shampoos, where a brightening effect is desired.
• Advanced Coatings: Employed in specialty coatings and paints where optical brightening properties are required for specific visual effects.

Basic Information

Product Name	Hexasodium 4,4'-Bis[[4,6-Bis(m-Sulphonatoanilino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	28950-63-2
Molecular Formula	C46H28N12Na6O18S6
Molecular Weight	1371.06 g/mol (Disodium salt form may vary)
Synonyms	Fluorescent Brightener 220 (FB 220); Tinopal CBS-X; Hexasodium 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis[3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonate]; Stilbene triazine fluorescent whitening agent; Optical Brightener OB-1 (for plastics); FWA 220; 4,4'-Bis(2-sulfostyryl)biphenyl derivative; CI Fluorescent Brightener 220
EINECS	Contact for details

Quality Control

Our Hexasodium 4,4'-Bis[[4,6-Bis(m-Sulphonatoanilino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent brightening strength, purity, and physical properties. Certificates of Analysis (COA) detailing key parameters such as assay, hue, and solubility are available upon request, supporting compliance with global supply chain requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellowish to off-white powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Brightening Strength	100 ± 3% (vs. Standard)
Hue	Standardized blue-white fluorescence
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	Max. 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.