Description

2,2'-[1,2-Ethenediylbis[(3-Sulfo-4,1-Phenylene)Imino[6-(Ethylamino)-1,3,5-Triazine-4,2-Diyl]Imino]]Bis(1,4-Benzenedisulfonic Acid)Hexasodium Salt is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene disulfonate class. Its core value lies in its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, thereby enhancing the perceived whiteness and brightness of treated materials. This compound is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior optical brightening effects. We supply this critical intermediate with a focus on batch-to-batch consistency and reliable global logistics.

Application

• Textile Finishing: As a key optical brightener for cotton, nylon, and wool fibers to achieve high-grade whiteness.
• Detergent & Laundry Care: Incorporated into laundry detergents, fabric softeners, and soaps to impart a "whiter-than-white" appearance to fabrics.
• Paper Manufacturing: Used in the production of high-brightness printing, writing, and specialty papers.
• Plastics and Polymers: Applied as a whitening agent for synthetic fibers (like polyester) and various plastic materials to counteract yellowing.
• Coatings and Paints: Enhances the brightness and visual appeal of white coatings and finishes.
• Advanced Material Synthesis: Serves as a functional intermediate or monomer for creating specialized polymers with fluorescent properties.

Basic Information

Product Name	2,2'-[1,2-Ethenediylbis[(3-Sulfo-4,1-Phenylene)Imino[6-(Ethylamino)-1,3,5-Triazine-4,2-Diyl]Imino]]Bis(1,4-Benzenedisulfonic Acid)Hexasodium Salt
CAS No.	25778-91-0
Molecular Formula	C₄₀H₃₀N₁₂Na₆O₁₈S₆
Molecular Weight	1373.1 g/mol (approx.)
Synonyms	Hexasodium 2,2'-(1,2-ethenediyl)bis[[5-[[4-[[6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]amino]-1,3-benzenedisulfonate]; Fluorescent Brightener 220; Tinopal CBS-X; Blankophor BSU; FWA 220; 4,4'-Bis[[4-anilino-6-(ethylamino)-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonic acid hexasodium salt; Distyrylbiphenyl derivative optical brightener.
EINECS	Contact for details

Quality Control

Our production of this optical brightener adheres to strict quality management protocols to ensure high purity and performance consistency. Every batch is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity, assay, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing purity, absorbance characteristics, and other key parameters is provided with each shipment, ensuring full traceability and compliance with your specifications.

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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Yellowish to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Absorbance (UV-Vis)	Conforms to standard
Solubility (in Water)	Clear, yellow solution

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