Description

Disodium 4,4'-Bis[[6-Anilino-4-[2-(2-Hydroxyethoxy)Ethoxy]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance, water-soluble fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene disulfonate 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 perceived whiteness and brightness of substrates. It is a critical raw material for manufacturers in the detergent, paper, textile, and plastics industries seeking to achieve superior product aesthetics and quality.

Application

• Detergent & Laundry Care Formulations: Primary application as an optical brightener in laundry detergents, fabric softeners, and soaps to compensate for fabric yellowing and impart a brilliant white appearance.
• Paper Manufacturing & Coating: Used in the production of high-quality writing, printing, and tissue papers to increase brightness and opacity, meeting stringent quality standards for premium paper products.
• Textile & Fiber Treatment: Applied in the finishing processes of cotton, nylon, and other fibers to enhance whiteness, especially for materials that have been bleached.
• Plastics & Synthetic Polymers: Incorporated into polymers like PVC, polyolefins, and styrenics to improve the visual appeal of molded articles, films, and fibers by masking inherent yellowness.
• Cosmetics & Personal Care: Utilized in certain cosmetic formulations where a brightening or whitening visual effect is desired, subject to regional regulatory compliance.
• Advanced Material Coatings: Employed in specialty coatings and inks where optical properties are critical for performance and visual impact.

Basic Information

Product Name	Disodium 4,4'-Bis[[6-Anilino-4-[2-(2-Hydroxyethoxy)Ethoxy]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	68003-31-6
Molecular Formula	C52H54N12Na2O14S2
Molecular Weight	1181.2 g/mol
Synonyms	Fluorescent Brightener 220; FWA 220; Tinopal CBS-X; Disodium 4,4'-bis{[4-anilino-6-[2-(2-hydroxyethoxy)ethoxy]-1,3,5-triazin-2-yl]amino}stilbene-2,2'-disulfonate; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[2-(2-hydroxyethoxy)ethoxy]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] disodium salt; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[[4-[2-(2-hydroxyethoxy)ethoxy]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]-, disodium salt; Optical Brightener OB-1 (industry-specific alias); CBS-X (common abbreviation)
EINECS	Contact for details

Quality Control

Our production of Disodium 4,4'-Bis[[6-Anilino-4-[2-(2-Hydroxyethoxy)Ethoxy]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, performance, and compliance with industry specifications. Key parameters such as active content, hue, and solubility are meticulously controlled. A comprehensive Certificate of Analysis (COA) documenting these results 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); the original 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	Yellowish to off-white powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture (KF)	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Ash Content	≤ 0.5%
Fluorescence Intensity	≥ 95% of reference standard
Solubility in Water	Clear, yellow solution

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