Description

Disodium 4,4'-Bis[[4-[(2-Hydroxyethyl)Methylamino]-6-Methoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene disulfonate class. It matters 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 essential 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 cotton, nylon, wool, and synthetic fibers during scouring, bleaching, or finishing processes.
• Laundry Detergents & Fabric Softeners: A key additive in household and industrial detergents to impart a "whiter-than-white" appearance to laundered fabrics.
• Paper Manufacturing: Used in the coating and pulp of high-quality writing, printing, and specialty papers to increase brightness and opacity.
• Plastics and Polymers: Incorporated into polymers like PVC, polyolefins, and styrenics to correct yellowness and improve the visual appeal of finished plastic articles.
• Soaps and Personal Care: Employed in certain cosmetic formulations and soaps to enhance product whiteness.
• Synthetic Fibers: Applied during the spinning process of man-made fibers to achieve inherent brightness.

Basic Information

Product Name	Disodium 4,4'-Bis[[4-[(2-Hydroxyethyl)Methylamino]-6-Methoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	94200-36-9
Molecular Formula	C40H44N12Na2O12S2
Molecular Weight	994.95 g/mol
Synonyms	Fluorescent Brightener 220; FB 220; Tinopal CBS-X; Stilbene triazine fluorescent whitening agent; 4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt (related structure); Disodium 4,4'-bis(4-phenylamino-6-morpholino-1,3,5-triazin-2-yl)aminostilbene-2,2'-disulfonate (common trade variant); Optical Brightener OB-1 (generic); 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(2-hydroxyethyl)methylamino]-6-methoxy-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] disodium salt
EINECS	Contact for details

Quality Control

Our production of Disodium 4,4'-Bis[[4-[(2-Hydroxyethyl)Methylamino]-6-Methoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, performance (whitening effect), and chemical composition. Certificates of Analysis (COA) detailing key parameters such as assay, absorbance, and hue are available upon request to support your quality assurance protocols.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Light yellow to yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Absorbance (in water)	Conforms to typical range
pH (1% Solution)	7.0 - 9.0
Water Solubility	Freely soluble

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