Description

Disodium 5-[[4-(bis(2-hydroxyethyl)amino)-6-[(3-sulfonatophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-[(E)-2-[4-[[4-(bis(2-hydroxyethyl)amino)-6-[(3-sulfonatophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfonatophenyl]ethenyl]benzenesulfonate is a high-purity, reactive 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 performance additive for manufacturers in the textiles, detergents, paper, and plastics industries seeking to achieve superior product aesthetics and quality.

Application

• Textile Finishing: Primary application for whitening and brightening cotton, nylon, wool, and blended fabrics 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 garments.
• Paper Manufacturing: Used in coating formulations and pulp for high-quality writing, printing, and specialty papers to improve brightness and opacity.
• Plastics and Synthetic Fibers: Incorporated into polymers like polyamide (nylon) and polyester during extrusion or molding to correct yellowness and enhance visual appeal.
• Soaps and Personal Care Products: Employed in certain cosmetic and soap bars to improve whiteness and brightness.
• Advanced Material Coatings: Potential use in coatings and inks where optical brightening properties are required for specific visual effects.

Basic Information

Item	Details
Product Name	Disodium 5-[[4-(bis(2-hydroxyethyl)amino)-6-[(3-sulfonatophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-[(E)-2-[4-[[4-(bis(2-hydroxyethyl)amino)-6-[(3-sulfonatophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfonatophenyl]ethenyl]benzenesulfonate
CAS No.	66813-34-1
Molecular Formula	C46H44N12Na2O14S4
Molecular Weight	~1155.14 g/mol
Synonyms	Fluorescent Brightener 220 (FBA 220); Tinopal CBS-X; Disodium 4,4'-bis[[4-[bis(2-hydroxyethyl)amino]-6-(3-sulfonatoanilino)-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonate; Stilbene triazine fluorescent whitening agent; Optical Brightener OB-1; C.I. Fluorescent Brightener 220; 4,4'-Bis[(4-bis(2-hydroxyethyl)amino-6-anilino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our production of this fluorescent whitening agent adheres to strict ISO 9001 quality management systems. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and assay, spectrophotometry for strength and shade, and checks for insolubles and heavy metals. A detailed Certificate of Analysis (COA) confirming identity, purity (typically >95%), and performance specifications is provided with each shipment to ensure batch-to-batch consistency and compliance with your formulation requirements.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength & Shade	Match to reference standard
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1%
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	≤ 20 ppm

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