Description

Disodium 4,4'-Bis[[4-Amino-6-[(2-Hydroxyethyl)Amino]-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. Its primary value lies in its exceptional ability to absorb UV light and re-emit it as visible blue light, thereby compensating for yellowish tints and enhancing the perceived whiteness and brightness of materials. This compound is essential for manufacturers in the detergent, paper, textile, and plastics industries seeking to achieve superior optical brightening effects in their products.

Application

• Laundry Detergents & Fabric Softeners: As a key optical brightener to make white fabrics appear brighter and colored fabrics more vivid after washing.
• Paper Manufacturing: Used in coating formulations and pulp to increase the whiteness and brightness of high-quality writing, printing, and tissue papers.
• Textile & Fiber Treatment: Applied in the finishing process of synthetic fibers (like polyamide, polyester blends) and cotton to impart a permanent whitening effect.
• Plastics & Polymers: Incorporated into polymers, adhesives, and coatings to improve visual appeal and counteract inherent yellowness.
• Soaps & Personal Care Products: Utilized in certain soap bars and cosmetic formulations to enhance product aesthetics.
• Advanced Formulations: Serves as a critical component in specialty chemical blends for high-end whitening applications requiring stability and performance.

Basic Information

Item	Details
Product Name	Disodium 4,4'-Bis[[4-Amino-6-[(2-Hydroxyethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	25295-51-6
Molecular Formula	C34H34N14Na2O10S2
Molecular Weight	908.82 g/mol
Synonyms	Disodium 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate; Fluorescent Brightener 220; Tinopal CBS-X; Blankophor BSU; FWA 220; Optical Brightener OB-1; 4,4'-Bis[(4-anilino-6-morpholino-s-triazin-2-yl)amino]-2,2'-stilbenedisulfonic acid disodium salt; Distyrylbiphenyl derivative brightener
EINECS	Contact for details

Quality Control

Our production of Disodium 4,4'-Bis[[4-Amino-6-[(2-Hydroxyethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, performance (whiteness index), and chemical stability. Comprehensive Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are provided to guarantee compliance with your application 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and flow characteristics.

Specification

Item	Specification
Appearance	Yellowish to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (Karl Fischer)	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Whiteness Degree	Standard sample comparison
Solubility in Water	Freely soluble

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