Description

Tetrasodium 5-[[4-(2-hydroxyethylamino)-6-[(4-sulfonatophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-[(E)-2-[4-[[4-(2-hydroxyethylamino)-6-[(4-sulfonatophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfonato-phenyl]ethenyl]benzenesulfonate is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the stilbene-triazine class. This compound is engineered to provide 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 an essential component for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior product aesthetics and quality.

Application

• Textile Finishing: Primary application for whitening and brightening cotton, nylon, polyester, and blended fabrics during manufacturing or laundering.
• Laundry Detergents & Fabric Softeners: Key additive in powder and liquid detergents to compensate for fabric yellowing and deliver a "whiter-than-white" visual appeal.
• Paper Manufacturing: Used in coating formulations and pulp to improve the brightness and opacity of high-quality writing, printing, and packaging papers.
• Plastics and Synthetic Fibers: Incorporated into polymer matrices (e.g., PVC, polyolefins) and synthetic fibers during extrusion to correct inherent yellowness.
• Soaps and Personal Care: Employed in bar soaps, liquid hand washes, and cosmetic formulations to enhance product whiteness and purity perception.
• Advanced Coatings: Functional additive in paints, varnishes, and other coating systems to improve initial brightness and counteract aging-induced yellowing.

Basic Information

Product Name	Tetrasodium 5-[[4-(2-hydroxyethylamino)-6-[(4-sulfonatophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-[(E)-2-[4-[[4-(2-hydroxyethylamino)-6-[(4-sulfonatophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfonato-phenyl]ethenyl]benzenesulfonate
CAS No.	20182-56-3
Molecular Formula	C₄₆H₃₄N₁₂Na₄O₁₄S₄
Molecular Weight	~1228.0 g/mol
Synonyms	Fluorescent Brightener 220 (FB 220); Tinopal CBS-X; Blankophor BSU; Benzenesulfonic acid, 5-[[4-[2-(2-hydroxyethylamino)-6-(4-sulfophenylamino)-1,3,5-triazin-2-yl]amino]-2-[2-[4-[[4-[2-(2-hydroxyethylamino)-6-(4-sulfophenylamino)-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]ethenyl]-, tetrasodium salt; FWA 220; Optical Brightener 220; 4,4'-Bis[[4-[2-(2-hydroxyethylamino)-6-(4-sulfophenylamino)-1,3,5-triazin-2-yl]amino]-2-sulfostyryl]biphenyl, tetrasodium salt; Distyrylbiphenyl derivative fluorescent whitening agent.
EINECS	Contact for details

Quality Control

Our tetrasodium fluorescent whitening agent is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and isomer distribution, spectrophotometry for strength and hue, and rigorous checks for heavy metals and other impurities, ensuring compliance with global industry standards for detergents and textiles. Certificates of Analysis (COA) detailing all specifications are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive) and must be stored in a cool, dry place at a controlled room temperature (15-25°C). Ensure the storage area is well-ventilated and away from incompatible materials. Use original packaging and keep containers sealed when not in 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%
pH (1% Solution)	7.0 - 9.0
Ash Content (Sulfated)	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility in Water	Clear, yellow solution

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