Description

Hexasodium 2,2'-[Vinylenebis[(3-Sulphonato-4,1-Phenylene)Imino(6-Phenoxy-1,3,5-Triazine-4,2-Diyl)Imino]]Bis(Benzene-1,4-Disulphonate) is a high-performance, water-soluble fluorescent whitening agent (FWA) belonging to the triazine-stilbene chemical class. This compound is engineered to deliver exceptional optical brightening effects by absorbing ultraviolet light and re-emitting it as visible blue light, thereby enhancing the whiteness and brightness of treated materials. It is a critical additive 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 during washing or finishing processes.
• Laundry Detergents & Fabric Softeners: Key ingredient in premium powder and liquid detergents to impart a "whiter-than-white" appearance to laundered garments.
• Paper Manufacturing: Used in coating formulations and pulp treatment to achieve high-brightness paper grades for printing, writing, and specialty papers.
• Plastics and Synthetic Fibers: Incorporated into polymers like PVC, polyolefins, and synthetic fibers (e.g., acrylics) to correct yellowness and improve visual quality.
• Soaps and Personal Care Products: Employed in certain soap bars and cosmetic formulations where a brightening effect is desired.
• Advanced Coatings: Utilized in specific industrial and decorative coatings to enhance brightness and opacity.

Basic Information

Product Name	Hexasodium 2,2'-[Vinylenebis[(3-Sulphonato-4,1-Phenylene)Imino(6-Phenoxy-1,3,5-Triazine-4,2-Diyl)Imino]]Bis(Benzene-1,4-Disulphonate)
CAS No.	41267-43-0
Molecular Formula	C₄₆H₂₈N₁₂Na₆O₂₀S₆
Molecular Weight	~1551.0 g/mol (Contact for details)
Synonyms	Fluorescent Brightener 220 (FB 220); Tinopal CBS-X; Hexasodium 4,4'-bis[[4-anilino-6-morpholino-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonate (related structure); Optical Brightener OB-1 (industry term); 4,4'-Bis[(4,6-dianilino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid hexasodium salt; Stilbene triazine fluorescent whitener; FWA ST; Whitening Agent for Cellulose
EINECS	Contact for details

Quality Control

Our production of this fluorescent whitening agent adheres to stringent quality management systems. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and assay, spectrophotometry for strength and shade, and checks for solubility and ionic content. Certificates of Analysis (COA) documenting all key parameters are provided to ensure batch-to-batch consistency and performance reliability for your formulations.

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); keep the original container tightly sealed to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Strength (Spectrophotometry)	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1%
pH (1% Solution)	7.0 - 9.0
Ionic Content (Chloride, Sulfate)	Contact for details

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