Description

4,4'-Bis[4-[3-Acetylamino-4-(4,8-Disulfo-2-Naphtylazo)Anilino]-6-Chloro-1,3,5-Triazin-2-Ylamino]-2,2'-Stilbenedisulfonic Acid Hexasodium Salt is a high-purity, water-soluble fluorescent brightening agent (FBA) belonging to the stilbene-triazine class. This compound is engineered to deliver exceptional whitening and brightening effects on cellulosic and synthetic fibers by absorbing ultraviolet light and re-emitting it as visible blue light. It is a critical component for manufacturers in the textile, paper, and detergent industries seeking to enhance the visual appeal and perceived cleanliness of their products. Our supply ensures consistent quality and performance for demanding industrial applications.

Application

• Textile Whitening: Primary application for whitening and brightening cotton, viscose, and other cellulosic fibers during manufacturing or finishing processes.
• Paper Brightening: Used in the production of high-brightness papers, including printing & writing grades and specialty papers, to improve optical properties.
• Detergent & Laundry Formulations: Incorporated into laundry detergents and fabric softeners as an optical brightener to make white fabrics appear whiter and colors look brighter.
• Synthetic Fiber Treatment: Applied to brighten polyamide (nylon) and other synthetic fibers to counteract natural yellowness.
• Industrial Coatings & Plastics: Utilized as a fluorescent whitening agent in specific coatings, adhesives, and plastic materials to improve aesthetics.
• Research & Development: Serves as a key intermediate or reference standard in the R&D of new dyes, pigments, and functional materials.

Basic Information

Product Name	4,4'-Bis[4-[3-Acetylamino-4-(4,8-Disulfo-2-Naphtylazo)Anilino]-6-Chloro-1,3,5-Triazin-2-Ylamino]-2,2'-Stilbenedisulfonic Acid Hexasodium Salt
CAS No.	101453-66-1
Molecular Formula	C68H42Cl2N18Na6O22S8
Molecular Weight	~1970.5 g/mol (Contact for exact details)
Synonyms	Fluorescent Brightener 220; FBA 220; Hexasodium 4,4'-bis[[4-[3-acetamido-4-[(4,8-disulfo-2-naphthyl)azo]anilino]-6-chloro-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonate; Stilbene triazine brightener; Optical Brightening Agent OBA 220; 2,2'-Stilbenedisulfonic acid, 4,4'-bis[[4-[3-(acetylamino)-4-[(4,8-disulfo-2-naphthalenyl)azo]phenyl]amino]-6-chloro-1,3,5-triazin-2-yl]amino]-, hexasodium salt; Tinopal CBS-X (related class).
EINECS	Contact for details

Quality Control

Our production of 4,4'-Bis[4-[3-Acetylamino-4-(4,8-Disulfo-2-Naphtylazo)Anilino]-6-Chloro-1,3,5-Triazin-2-Ylamino]-2,2'-Stilbenedisulfonic Acid Hexasodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure high purity, consistent chromophore strength, and optimal solubility. We provide detailed Certificates of Analysis (COA) with each shipment, documenting key parameters such as assay, shade, and impurity profiles. Our quality system is designed to meet the rigorous demands of global industrial and manufacturing partners.

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 material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials and heat sources.

Specification

Item	Specification
Appearance	Yellowish to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	Max. 20 ppm
Fluorescent Strength	Standardized vs. reference (Contact for details)

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