Description

Disodium 4,4'-Bis[[4,6-Bis(p-Chloroanilino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance 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 a bright blue fluorescence, effectively compensating for yellowness and enhancing the perceived whiteness and brightness of 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 finished products.

Application

• Detergent & Laundry Care: As a key additive in laundry detergents, fabric softeners, and soaps to make white fabrics appear brighter and colors more vivid.
• Paper Manufacturing: For whitening high-quality writing, printing, and tissue papers to achieve a premium bright white appearance.
• Textile & Fiber Treatment: Applied in the finishing process of cotton, nylon, and other synthetic fibers to enhance whiteness and luminosity.
• Plastics & Polymers: Incorporated into polymers like PVC, polyethylene, and polypropylene to improve the brightness and visual appeal of plastic products.
• Coatings & Paints: Used in specific coating formulations to provide an optical brightening effect, countering base yellowness.
• Advanced Material Synthesis: Serves as a functional intermediate or additive in the development of specialty chemicals and light-emitting materials.

Basic Information

Product Name	Disodium 4,4'-Bis[[4,6-Bis(p-Chloroanilino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	23729-34-2
Molecular Formula	C46H32Cl4N12Na2O6S2
Molecular Weight	1084.66 g/mol
Synonyms	Fluorescent Brightener 71; Tinopal UNPA-GX; Blankophor BSU; 4,4'-Bis{[4,6-bis(4-chloroanilino)-1,3,5-triazin-2-yl]amino}stilbene-2,2'-disulfonic acid disodium salt; Disodium 4,4'-bis(4,6-dianilino-1,3,5-triazin-2-ylamino)stilbene-2,2'-disulfonate derivative; FWA 71; Optical Brightener OB-3; Stilbene triazine fluorescent whitening agent
EINECS	Contact for details

Quality Control

Our production of Disodium 4,4'-Bis[[4,6-Bis(p-Chloroanilino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and spectrophotometry for fluorescence strength, to ensure consistent performance and batch-to-batch reliability. A detailed Certificate of Analysis (COA) documenting identity, purity, and key physical parameters is provided with each shipment to support your quality assurance processes.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Light yellow to yellow powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Moisture Content	≤ 2.0%
Fluorescence Intensity	≥ 95% of reference standard
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.