Description

Disodium 4,4'-Bis[[6-Anilino-4-(2-Hydroxyethoxy)-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 93982-93-5. It is valued for its exceptional ability to absorb UV light and re-emit it as visible blue light, thereby compensating for yellowish tints and enhancing the perceived whiteness and brightness of materials. This compound is a critical additive for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior optical brightening effects in their products.

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 household and industrial detergents to impart a "whiter-than-white" appearance to laundered fabrics.
• Paper & Pulp Industry: Used in the production of high-quality white papers, including printing, writing, and tissue papers, to improve brightness and opacity.
• Plastics & Polymers: Incorporated into polymers such as PVC, polyethylene, and polypropylene to correct yellowness and enhance the visual appeal of finished plastic articles.
• Coatings & Paints: Employed in specific coating formulations to increase whiteness and luminosity, particularly in water-based systems.
• Advanced Material Synthesis: Serves as a functional monomer or additive in the development of specialty materials requiring fluorescence properties.

Basic Information

Product Name	Disodium 4,4'-Bis[[6-Anilino-4-(2-Hydroxyethoxy)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	93982-93-5
Molecular Formula	C40H36N12Na2O10S2
Molecular Weight	962.90 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; Disodium 4,4'-bis[(4-anilino-6-bis(2-hydroxyethyl)amino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate; Stilbene-based optical brightener; FWA 220; 4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt (related structure); CBS-X; Optical Brightening Agent OBA 220
EINECS	Contact for details

Quality Control

Our Disodium 4,4'-Bis[[6-Anilino-4-(2-Hydroxyethoxy)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, performance, and compliance with industry specifications for fluorescent whitening agents. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee traceability and quality assurance for our global B2B clients.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed after opening to minimize exposure to atmospheric moisture and light, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Light yellow to yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Ash Content	≤ 0.5%
Fluorescence Intensity	≥ 95% of reference standard
Heavy Metals (as Pb)	≤ 20 ppm

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