Description

Disodium 4,4'-Bis[[4-Amino-6-[Bis(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 class, with CAS number 20182-55-2. It provides exceptional optical brightening effects by absorbing ultraviolet light and re-emitting it as visible blue light, significantly enhancing the whiteness and brightness of treated materials. This compound is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior product aesthetics and market appeal.

Application

• Textile Finishing: Primary application for whitening and brightening cotton, nylon, polyester, and blended fabrics.
• Laundry Detergents & Fabric Softeners: Key additive in premium powder and liquid detergents to impart a "whiter-than-white" appearance to laundered clothing.
• Paper Manufacturing: Used in coating formulations and pulp treatment to produce high-brightness printing, writing, and specialty papers.
• Plastics and Synthetic Fibers: Incorporated into polymers like PVC, polyolefins, and synthetic fibers during extrusion or molding to correct yellowness and improve visual quality.
• Soaps and Personal Care Products: Employed in certain cosmetic and soap formulations to enhance perceived cleanliness and brightness.
• Advanced Coatings: Utilized in specific paint and coating systems where optical brightening properties are required.

Basic Information

Product Name	Disodium 4,4'-Bis[[4-Amino-6-[Bis(2-Hydroxyethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	20182-55-2
Molecular Formula	C34H38N14Na2O10S2
Molecular Weight	908.86 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; Blankophor BSU; Disodium 4,4'-bis(2-sulfonatostyryl)biphenyl derivative; 4,4'-Bis[(4-anilino-6-bis(2-hydroxyethyl)amino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt; Stilbene-based optical brightener; FWA 220; FBA 220
EINECS	243-619-0

Quality Control

Our production of Disodium 4,4'-Bis[[4-Amino-6-[Bis(2-Hydroxyethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, performance (whitening effect), and compliance with relevant industry specifications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is provided with each shipment to guarantee traceability and product integrity.

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	Yellowish to off-white 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)	Standard sample comparison

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