Description

Disodium 4,4'-Bis[[4-[Bis(2-Hydroxyethyl)Amino]-6-Methoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance, water-soluble fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene class. Its primary value lies in its exceptional ability to absorb UV light and re-emit it as visible blue light, effectively compensating for yellowness and enhancing the brightness and whiteness of treated materials. This compound is critically needed by manufacturers in the detergent, paper, textile, and plastics industries seeking to achieve superior optical brightening effects in their final products.

Application

• Detergent & Laundry Care Formulations: As a key optical brightener in laundry detergents, fabric softeners, and soaps to impart a "whiter-than-white" appearance to textiles.
• Paper & Pulp Industry: Used in the coating and sizing of high-quality papers, including writing, printing, and art papers, to improve brightness and opacity.
• Textile Finishing: Applied in the finishing bath for cotton, nylon, and other fibers to enhance whiteness, especially for materials that have yellowed during processing.
• Plastics and Synthetic Fibers: Incorporated into polymers such as polyamide (nylon) and polyester during extrusion or molding to correct inherent yellowness and improve visual appeal.
• Advanced Coatings: Utilized in specific coating formulations where brightening and whitening effects are required without compromising other physical properties.

Basic Information

Item	Details
Product Name	Disodium 4,4'-Bis[[4-[Bis(2-Hydroxyethyl)Amino]-6-Methoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	4470-72-8
Molecular Formula	C40H44N12Na2O14S2
Molecular Weight	1030.96 g/mol
Synonyms	Fluorescent Brightener 71; Tinopal UNPA-GX; Blankophor BSU; Disodium 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate (related structure); Stilbene triazine fluorescent whitening agent; FWA 71; Optical Brightener 71; 4,4'-Bis[(4-anilino-6-bis(2-hydroxyethyl)amino-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 stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including purity (HPLC), color strength, shade, and solubility. A comprehensive Certificate of Analysis (COA) documenting these results is provided with each shipment to support your quality assurance and regulatory compliance needs.

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 opening to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Yellowish to light yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture (Karl Fischer)	≤ 5.0%
Ash Content	≤ 0.5%
Solubility in Water	Clear, yellow solution

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