Description

Disodium 4,4'-Bis[[6-Anilino-1,4-Dihydro-4-Oxo-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene class. It matters because it provides exceptional optical brightening effects, enhancing the perceived whiteness and brightness of materials under UV light. This product is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to improve the visual appeal and quality of their finished goods.

Application

• Textile Finishing: Primary application for whitening and brightening cotton, nylon, wool, and blended fabrics.
• Paper Manufacturing: Used in high-quality paper and board production to achieve superior brightness and opacity.
• Detergent & Laundry Care: A key additive in laundry detergents and fabric softeners to make white clothes appear brighter and colors more vivid.
• Plastics and Synthetic Fibers: Incorporated into polymers, polyesters, and PVC to counteract yellowing and improve whiteness.
• Coatings and Paints: Enhances the brightness of white paints and coatings.
• Advanced Material Synthesis: Serves as a functional intermediate or monomer in the development of specialty optical materials.

Basic Information

Product Name	Disodium 4,4'-Bis[[6-Anilino-1,4-Dihydro-4-Oxo-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	1264-32-0
Molecular Formula	C40H28N12Na2O8S2
Molecular Weight	906.82 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; 4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt; Stilbene triazine fluorescent whitening agent; FWA 220; Optical Brightener 220; Disodium 4,4'-bis(2-sulfonatostyryl)biphenyl derivative (common class name); 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] disodium salt (related variant).
EINECS	215-041-0

Quality Control

Our Disodium 4,4'-Bis[[6-Anilino-1,4-Dihydro-4-Oxo-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous testing for key parameters including purity, hue, and strength to ensure consistent performance and compliance with industry standards. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory needs.

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). Keep away from incompatible materials and direct heat sources. The product is light-sensitive and should be stored away from light as indicated.

Specification

Item	Specification
Appearance	Light yellow to yellowish-green powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Ash Content (Sulfated)	≤ 0.5%
pH (1% Solution)	7.0 - 9.0
Whiteness / Fluorescence	Standard sample comparison

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