Description

Tetrasodium 4,4'-Bis[[4-[Bis(2-Hydroxypropyl)Amino]-6-[(3-Sulphonatophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance, water-soluble fluorescent whitening agent (FWA) belonging to the stilbene-triazine derivative 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 treated materials. It is a critical additive for manufacturers in the textile, detergent, paper, and plastics industries seeking to achieve superior product aesthetics and market appeal.

Application

• Textile Finishing: Primary application for whitening and brightening cotton, nylon, polyester, 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 treatment to achieve high brightness grades in fine papers, tissues, and board.
• Plastics and Synthetic Fibers: Incorporated into polymers like PVC, polyolefins, and synthetic fibers (e.g., polyamide) to correct yellowness and improve visual quality.
• Soaps and Personal Care: Employed in certain soap bars and cosmetic formulations where a whitening effect is desired.
• Advanced Coatings: Utilized in specialty paints and coatings to enhance brightness and opacity.

Basic Information

Product Name	Tetrasodium 4,4'-Bis[[4-[Bis(2-Hydroxypropyl)Amino]-6-[(3-Sulphonatophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	93778-03-1
Molecular Formula	C52H56N14Na4O18S4
Molecular Weight	~1413.3 g/mol
Synonyms	Fluorescent Brightener 71; FB 71; Tinopal CBS-X; Stilbene triazine fluorescent whitening agent; 4,4'-Bis[[4-[bis(2-hydroxypropyl)amino]-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonic acid tetrasodium salt; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis(2-hydroxypropyl)amino]-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] tetrasodium salt; Optical Brightener OB-1 (for plastics); FWA CBS
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 4,4'-Bis[[4-[Bis(2-Hydroxypropyl)Amino]-6-[(3-Sulphonatophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and assay, spectrophotometry for strength and shade, and checks for insolubles and heavy metals. Certificates of Analysis (COA) documenting all key parameters are provided to ensure traceability and compliance with your specifications and relevant industry standards.

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 original container must be kept tightly sealed after use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Yellowish to off-white powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Strength (Spectrophotometry)	100 ± 3% of standard
Moisture (Karl Fischer)	≤ 5.0%
Water Solubility (1% Solution)	Clear, yellow fluorescent solution
pH (1% Aqueous Solution)	7.0 - 9.5
Heavy Metals (as Pb)	≤ 20 ppm

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