Description

Disodium 4,4'-Bis[[4-Anilino-6-[(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. This compound is engineered to provide exceptional optical brightening effects by absorbing ultraviolet light and re-emitting 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 product aesthetics and market appeal.

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: A key ingredient in premium powder and liquid detergents to impart a "whiter-than-white" appearance to laundered fabrics.
• Paper Manufacturing: Used in the production of high-quality writing, printing, and packaging papers to achieve a brilliant white shade and improve print contrast.
• Plastics and Polymers: Incorporated into polymers such as PVC, polyolefins, and styrenics to correct yellowness and enhance the brightness of finished plastic products.
• Cosmetics and Personal Care: Employed in formulations like shampoos and soaps to improve the visual appeal of the product itself.
• Advanced Coatings: Used in specific paint and coating formulations to increase luminosity and visual purity.

Basic Information

Product Name	Disodium 4,4'-Bis[[4-Anilino-6-[(2-Hydroxyethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	17958-73-5
Molecular Formula	C₄₀H₃₈N₁₂Na₂O₁₀S₂
Molecular Weight	973.0 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-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt (related structure); Stilbene triazine fluorescent whitener; Optical Brightener OB-1 (industry generic); FWA 220
EINECS	241-898-8

Quality Control

Our production of Disodium 4,4'-Bis[[4-Anilino-6-[(2-Hydroxyethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to stringent quality management systems. Every batch undergoes comprehensive analytical testing to ensure consistent purity, performance (whitening effect), and chemical stability. We provide detailed Certificates of Analysis (COA) with each shipment, documenting key parameters such as assay, absorbance, and hue. Our quality commitment supports compliance with global regulatory frameworks including REACH.

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 heat sources and incompatible materials. The product is light-sensitive (store away from light), as indicated in its chemical properties.

Specification

Item	Specification
Appearance	Light yellow to yellowish-green powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Absorbance (UV-Vis)	Conforms to standard
Whiteness Degree	Standard sample comparison
Solubility in Water	Freely soluble

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