Description

Disodium 4,4'-Bis[[1,4-Dihydro-6-[(2-Hydroxyethyl)Amino]-4-Oxo-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 deliver exceptional optical brightening effects by absorbing ultraviolet light and re-emitting it as visible blue light, thereby enhancing the 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 appeal.

Application

• Textile Finishing: Primary application for whitening and brightening cotton, nylon, wool, and synthetic fibers during scouring, bleaching, or finishing processes.
• 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 treatment to achieve high brightness grades in fine papers, tissues, and board.
• Plastics and Polymers: Incorporated into polymers like PVC, polyethylene, and polypropylene to correct yellowness and improve the visual quality of finished plastic products.
• Soaps and Personal Care: Employed in certain soap bars and cosmetic formulations where a brightening effect is desired.
• Synthetic Leather & Coatings: Applied in coatings and synthetic leather production to enhance whiteness and opacity.

Basic Information

Product Name	Disodium 4,4'-Bis[[1,4-Dihydro-6-[(2-Hydroxyethyl)Amino]-4-Oxo-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	82944-33-0
Molecular Formula	C34H34N12Na2O10S2
Molecular Weight	872.81 g/mol
Synonyms	Fluorescent Brightener 220 (FBA 220); Tinopal CBS-X; 4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt (related structural analog); Stilbene triazine fluorescent whitening agent; Optical Brightener OB-1 (common trade category); Disodium 4,4'-bis(2-sulfonatostyryl)biphenyl derivative (simplified); 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] disodium salt; CI Fluorescent Brightener 220.
EINECS	Contact for details

Quality Control

Our Disodium 4,4'-Bis[[1,4-Dihydro-6-[(2-Hydroxyethyl)Amino]-4-Oxo-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 supply reliability and product integrity for your production processes.

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 after opening 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 (Karl Fischer)	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Ash Content	≤ 0.5%
Whiteness Degree (on cotton)	Standard sample ± 5%
Solubility in Water	Clear, faint yellow solution

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