Description

Hexasodium 2,2'-[Vinylenebis[(3-Sulfonato-4,1-Phenylene)Imino[6-[Bis (2-Hydroxypropyl)Amino]-1,3,5-Triazine-4,2-Diyl]Imino]]Bis(Benzene- 1,4-Disulfonate) is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the triazine-stilbene class. This compound is engineered to deliver exceptional optical brightening performance by absorbing UV light and re-emitting it as visible blue light, thereby enhancing the perceived 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 competitiveness.

Application

• Textile Finishing: Primary application for whitening and brightening natural and synthetic fibers like cotton, polyester, and polyamide during manufacturing or laundering.
• Laundry Detergents & Fabric Softeners: Key ingredient in premium powder and liquid detergents to impart a "whiter-than-white" appearance to laundered fabrics.
• Paper Manufacturing: Used in coating formulations and pulp to enhance the brightness and optical quality of high-grade printing, writing, and specialty papers.
• Plastics and Synthetic Fibers: Incorporated into polymer matrices (e.g., PVC, polyolefins) and synthetic fiber spins to correct yellowness and improve visual appeal.
• Personal Care Products: Employed in certain cosmetics and soaps to increase the perceived brightness and cleanliness of the final product.
• Advanced Coatings: Utilized in specific coating systems where optical brightening properties are required for specialized visual effects.

Basic Information

Item	Details
Product Name	Hexasodium 2,2'-[Vinylenebis[(3-Sulfonato-4,1-Phenylene)Imino[6-[Bis (2-Hydroxypropyl)Amino]-1,3,5-Triazine-4,2-Diyl]Imino]]Bis(Benzene- 1,4-Disulfonate)
CAS No.	371756-75-1
Molecular Formula	C52H48N12Na6O24S6
Molecular Weight	Approx. 1551.2 g/mol
Synonyms	Fluorescent Brightener 351; FWA 351; Optical Brightener 351; Hexasodium 4,4'-bis{[4-anilino-6-[bis(2-hydroxypropyl)amino]-1,3,5-triazin-2-yl]amino}stilbene-2,2'-disulfonate; Stilbene triazine fluorescent whitening agent; Tinopal CBS-X; Blankophor BSU liq.; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis(2-hydroxypropyl)amino]-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] hexasodium salt
EINECS	Contact for details

Quality Control

Our production of Hexasodium 2,2'-[Vinylenebis[(3-Sulfonato-4,1-Phenylene)Imino[6-[Bis (2-Hydroxypropyl)Amino]-1,3,5-Triazine-4,2-Diyl]Imino]]Bis(Benzene- 1,4-Disulfonate) adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, performance, and compliance with industry specifications. Comprehensive Certificates of Analysis (COA) detailing assay, impurity profile, and physical properties are available upon request 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). 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 handling.

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
Water Solubility	Freely soluble
Ash Content (as Sulfate)	≤ 20.0%

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