Description

Disodium 4,4'-Bis[[4-Chloro-6-[(2-Hydroxyethyl)Methylamino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene disulfonate class. It matters because it provides exceptional optical brightening effects, enhancing the whiteness and brightness of materials under UV light by converting it into visible blue light. This compound is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior product aesthetics and market appeal. Its specific chemical structure offers excellent substantivity and light fastness for demanding applications.

Application

• Textile Finishing: Primary use as an optical brightener for cotton, viscose, nylon, and wool, applied during bleaching or in finishing baths.
• Detergent & Laundry Care: Key ingredient in high-efficiency laundry detergents, powders, and liquids to make white fabrics appear brighter and colors more vivid.
• Paper Manufacturing: Used in coating formulations and pulp to achieve high brightness grades in fine papers, tissues, and board.
• Plastics and Polymers: Incorporated into synthetic fibers (like polyester), masterbatches, and plastic products to counteract yellowing and improve visual quality.
• Soaps and Personal Care: Employed in the production of bar soaps, liquid soaps, and cosmetic formulations for a clean, bright appearance.
• Industrial Coatings: Enhances the whiteness of paints, varnishes, and other surface coatings.

Basic Information

Product Name	Disodium 4,4'-Bis[[4-Chloro-6-[(2-Hydroxyethyl)Methylamino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	25790-73-2
Molecular Formula	C34H34Cl2N12Na2O10S2
Molecular Weight	907.71 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; Blankophor BSU; 4,4'-Bis[(4-chloro-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt (related structure); Disodium 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate (variant); FWA 220; Optical Brightener OB-1; Stilbene triazine brightener
EINECS	Contact for details

Quality Control

Our Disodium 4,4'-Bis[[4-Chloro-6-[(2-Hydroxyethyl)Methylamino]-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 purity, performance, and batch-to-batch uniformity. Key parameters such as active content, hue, and solubility are verified. A comprehensive Certificate of Analysis (COA) documenting these results is provided with each shipment to support your quality assurance protocols.

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 product is hygroscopic (moisture-sensitive) and light-sensitive; prolonged exposure to moisture or direct light should be avoided to maintain stability and performance.

Specification

Item	Specification
Appearance	Light yellow to yellowish powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Water Solubility	Freely soluble
Ash Content (Sulfated)	≤ 0.5%

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