Description

Sodium 4,4'-Bis[[6-Anilino-4-[(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 stilbene-triazine class. It matters because it provides exceptional optical brightening effects, enhancing the perceived whiteness and brightness of materials under UV light. This compound is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to improve product aesthetics and quality.

Application

• Textile Finishing: Primary application for whitening and brightening cotton, polyester, nylon, and blended fabrics.
• Paper Manufacturing: Used in high-quality paper and board production to achieve superior brightness and blue-white shade.
• Laundry Detergents & Fabric Softeners: A key additive in household and industrial detergents to make white clothes appear brighter and colors more vivid.
• Plastics and Synthetic Fibers: Incorporated into polymers, resins, and masterbatches to counteract yellowing and improve visual appeal.
• Coatings and Paints: Enhances the brightness of white paints and coatings, especially in water-based formulations.
• Soaps and Personal Care Products: Used in certain cosmetic and soap formulations to impart a clean, bright appearance.

Basic Information

Product Name	Sodium 4,4'-Bis[[6-Anilino-4-[(2-Hydroxyethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	85204-51-9
Molecular Formula	C40H38N12Na2O8S2
Molecular Weight	924.90 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; Stilbene Brightener 220; 4,4'-Bis[(4-anilino-6-bis(2-hydroxyethyl)amino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt; FWA 220; Optical Brightener OB-1 (specific grade); 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; Blankophor ER
EINECS	286-349-1

Quality Control

Our Sodium 4,4'-Bis[[6-Anilino-4-[(2-Hydroxyethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is manufactured under a strict quality management system. Each batch undergoes rigorous testing for critical parameters including purity, shade, and solubility to ensure consistent performance. Certificates of Analysis (COA) documenting these specifications are available for every 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). Keep away from incompatible materials and direct heat sources. Due to its light-sensitive nature, prolonged exposure to light should be avoided to maintain product efficacy.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Ash Content (Sulfated)	≤ 0.5%
Whiteness Degree (on cotton)	≥ 150 (CIE)
Solubility in Water	Clear, yellow-green solution

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