Description

Disodium 5-[[4-Amino-6-Anilino-1,3,5-Triazin-2-Yl]Amino]-2-[2-[4-[(4,6-Diamino-1,3,5-Triazin-2-Yl)Amino]-2-Sulphonatophenyl]Vinyl]Benzenesulphonate is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene family. Its primary value lies in its exceptional ability to absorb UV light and re-emit it as visible blue light, thereby enhancing the perceived whiteness and brightness of treated materials. This compound is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior optical brightening effects. The product, identified by CAS NO 52298-21-2, is supplied as a consistent, high-quality powder to ensure reliable performance in demanding industrial applications.

Application

The compound is a highly effective optical brightener used across multiple industries to correct yellowness and improve visual appeal.

• Textile Finishing: Applied to cotton, nylon, and polyester fabrics during washing or finishing to impart a brilliant white appearance.
• Paper Manufacturing: Incorporated into pulp or coatings for high-quality writing, printing, and specialty papers to achieve high brightness levels.
• Laundry Detergents & Fabric Softeners: A key additive in premium detergent formulations to make white clothes appear whiter and colors look brighter after washing.
• Plastics and Synthetic Fibers: Used as a masterbatch additive for polymers like PVC, polyolefins, and polystyrene to offset inherent yellowness.
• Soaps and Personal Care Products: Enhances the whiteness of bar soaps, liquid soaps, and cosmetic formulations.
• Coatings and Paints: Employed in specific coating systems where optical brightness is required.

Basic Information

Product Name	Disodium 5-[[4-Amino-6-Anilino-1,3,5-Triazin-2-Yl]Amino]-2-[2-[4-[(4,6-Diamino-1,3,5-Triazin-2-Yl)Amino]-2-Sulphonatophenyl]Vinyl]Benzenesulphonate
CAS No.	52298-21-2
Molecular Formula	C30H24N12Na2O6S2
Molecular Weight	766.70 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(4,6-diamino-1,3,5-triazin-2-yl)amino]-2-sulfophenyl]amino]benzenesulfonic acid] disodium salt; Disodium 4,4'-bis[[4-anilino-6-morpholino-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonate (related compound); Optical Brightener OB-1 (industry term); FWA 220; CBS-X; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[[4-[(4,6-diamino-1,3,5-triazin-2-yl)amino]-2-sulfophenyl]amino]-, sodium salt (1:2)
EINECS	257-808-6

Quality Control

Our production of Disodium 5-[[4-Amino-6-Anilino-1,3,5-Triazin-2-Yl]Amino]-2-[2-[4-[(4,6-Diamino-1,3,5-Triazin-2-Yl)Amino]-2-Sulphonatophenyl]Vinyl]Benzenesulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure high purity, consistent brightening strength, and optimal solubility. Key parameters including assay, absorbance characteristics, and impurity profiles are verified. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance with your specifications.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Water Solubility	Freely soluble
Ash Content	≤ 0.5%

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