Description

Benzencnessulfonic Acid, 2,2'-(1,2-Ethenediyl)Bis[5-[4,6-Bis[(2-Sulfoethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]-, Hexasodium Salt is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene class. This compound matters for its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, thereby enhancing the perceived whiteness and brightness of materials. It is critically needed by manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior optical brightening effects in their products.

Application

This specialized fluorescent whitening agent is engineered for high-performance applications where brilliant whiteness is paramount.

• Textile Finishing: Primary application for whitening and brightening cotton, linen, nylon, and wool fibers during manufacturing or finishing processes.
• Paper Manufacturing: Used in high-quality writing, printing, and specialty papers to achieve a bright, white appearance.
• Laundry Detergents & Fabric Softeners: A key additive in premium detergent formulations to make white fabrics appear brighter and colors more vivid after washing.
• Plastics and Synthetic Fibers: Incorporated into polymers, resins, and synthetic fibers (e.g., polyester) to correct yellowness and improve aesthetic appeal.
• Coatings and Paints: Utilized in specific coating systems to enhance brightness and opacity.
• Advanced Material Synthesis: Serves as a functional intermediate or additive in the development of light-emitting or light-managing materials.

Basic Information

Product Name	Benzencnessulfonic Acid, 2,2'-(1,2-Ethenediyl)Bis[5-[4,6-Bis[(2-Sulfoethyl)Amino]-1,3,5-Triazin-2-Yl]Amino]-, Hexasodium Salt
CAS No.	3656-31-3
Molecular Formula	C34H36N12Na6O18S6
Molecular Weight	~1370.0 g/mol (Contact for exact details)
Synonyms	Hexasodium 2,2'-(1,2-ethenediyl)bis[5-[[4,6-bis[(2-sulfoethyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonate]; Fluorescent Brightener 220; FWA 220; Tinopal CBS-X; Stilbene-based Optical Brightener; 4,4'-Bis[[4,6-bis(2-sulfoethylamino)-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonic acid hexasodium salt; 2,2'-(1,2-Ethenediyl)bis[5-[[4,6-bis[(2-sulfoethyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] hexasodium salt
EINECS	Contact for details

Quality Control

Our production of this fluorescent whitening agent adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against critical parameters including purity, spectral characteristics (fluorescence emission), and solubility. Certificates of Analysis (COA) documenting these results are provided and available upon request to support your quality assurance and regulatory 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). This product is hygroscopic (moisture-sensitive); ensure the container is kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Yellowish to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Water Solubility	Freely soluble
Fluorescence Intensity	Meets reference standard
Heavy Metals (as Pb)	≤ 20 ppm

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