Description

Tetrasodium 4,4'-Bis[4-(p-Sulphonatophenyl)-2H-1,2,3-Triazol-2-Yl]Stilbene-2,2'-Disulphonate is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the stilbene-triazole class. This compound is valued for its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, thereby enhancing the perceived whiteness and brightness of materials. It is a critical additive for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior optical brightening effects. The product is supplied as a fine powder, optimized for consistent performance and ease of formulation.

Application

• Textile Finishing: As a key optical brightener for cotton, nylon, and polyester fibers to achieve high whiteness indexes in fabrics and garments.
• Paper Manufacturing: Used in coating formulations and pulp to enhance the brightness and visual appeal of high-quality writing, printing, and specialty papers.
• Detergent & Laundry Care: Incorporated into laundry detergents, fabric softeners, and soaps to impart a "whiter-than-white" appearance to laundered textiles.
• Plastics and Polymers: Applied as a whitening agent for synthetic fibers, films, and molded plastic articles to counteract yellowing and improve aesthetic quality.
• Cosmetics and Personal Care: Utilized in formulations where a brightening or whitening effect is desired, subject to relevant regional safety regulations.
• Advanced Material Coatings: Employed in specialty coatings and inks where optical properties and fluorescence are required for functional or decorative purposes.

Basic Information

Item	Details
Product Name	Tetrasodium 4,4'-Bis[4-(p-Sulphonatophenyl)-2H-1,2,3-Triazol-2-Yl]Stilbene-2,2'-Disulphonate
CAS No.	24239-35-8
Molecular Formula	C34H20N6Na4O12S4
Molecular Weight	924.78 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; Stilbene triazole fluorescent whitening agent; 4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid tetrasodium salt (related compound); FWA 220; Optical Brightener OB-1; Blankophor BSU; Distyrylbiphenyl derivative fluorescent agent
EINECS	Contact for details

Quality Control

Our Tetrasodium 4,4'-Bis[4-(p-Sulphonatophenyl)-2H-1,2,3-Triazol-2-Yl]Stilbene-2,2'-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, fluorescence intensity, and solubility. Certificates of Analysis (COA) documenting key parameters are provided to guarantee batch-to-batch consistency and performance reliability for your applications.

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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Light yellow to yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Fluorescence Intensity	≥ 98% of reference standard
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1% (w/v)
pH (1% Solution)	7.0 - 9.0
Ash Content	Contact for details

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