Description

Sodium 4,4'-Bis[[6-Anilino-4-(Methylamino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene class. Its core value lies in its exceptional ability to absorb ultraviolet light and re-emit it as a bright blue fluorescence, effectively compensating for yellowish tints and enhancing the perceived whiteness and brightness of materials. This compound is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior optical brightening effects. Its water-soluble sodium sulfonate groups ensure good compatibility and leveling in aqueous application systems.

Application

This advanced fluorescent whitening agent is engineered for a wide range of industrial applications where optical brightening is critical:

• Textile Finishing: Primary use for whitening and brightening cotton, linen, viscose, and nylon fibers during bleaching or in finishing baths.
• Detergent & Laundry Care: A key additive in high-efficiency laundry detergents, powders, and liquids to impart a "whiter-than-white" appearance to fabrics.
• Paper Manufacturing: Used in coating formulations and pulp treatment to achieve high brightness grades in fine papers, tissues, and board.
• Plastics and Polymers: Incorporated into synthetic fibers (like polyester), PVC, and other polymers to correct yellowness and improve visual appeal.
• Soaps and Personal Care: Employed in the production of bar soaps, liquid soaps, and cosmetic formulations to enhance product whiteness.
• Advanced Material Coatings: Applied in specialty coatings and paints where optical brightness is a desired functional property.

Basic Information

Product Name	Sodium 4,4'-Bis[[6-Anilino-4-(Methylamino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	85187-74-2
Molecular Formula	C40H34N14Na2O6S2
Molecular Weight	924.90 g/mol
Synonyms	Fluorescent Brightener 220; FWA 220; Tinopal CBS-X; Stilbene triazine fluorescent whitening agent; 4,4'-Bis[(4-anilino-6-methylamino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt; 2,2'-(1,2-Ethenediyl)bis[5-[[4-(methylamino)-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] disodium salt; Optical Brightener OB-1 (industry-specific); Disodium 4,4'-bis[(4-anilino-6-methylamino-s-triazin-2-yl)amino]stilbene-2,2'-disulphonate
EINECS	Contact for details

Quality Control

Our production of Sodium 4,4'-Bis[[6-Anilino-4-(Methylamino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure consistent purity, performance (fluorescence intensity), and application properties. We provide detailed Certificates of Analysis (COA) that include key parameters such as assay, hue, and solubility. Our quality systems are designed to meet the rigorous demands of global supply chains, supporting compliance with relevant industry standards.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent moisture absorption and caking. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Light yellow to yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Fluorescence Intensity	≥ 98% of standard
Solubility in Water	Clear, complete solution
Ash Content (Sulfated)	Contact for details

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