Description

Octasodium 2,2'-[Vinylenebis[(3-Sulphonato-4,1-Phenylene)Imino[6-[Methyl(2-Sulphonatoethyl)Amino]-1,3,5-Triazine-4,2-Diyl]Imino]]Bis(Benzene-1,4-Disulphonate) is a high-purity, multi-sulfonated fluorescent whitening agent (FWA) belonging to the triazine-stilbene chemical class. Its primary value lies in its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, thereby enhancing the brightness and perceived whiteness of various substrates. This compound is essential for manufacturers in the detergent, paper, textile, and plastics industries seeking to achieve superior optical brightening effects in their final products.

Application

• Laundry Detergents & Fabric Softeners: As a key optical brightener to make white fabrics appear brighter and counteract yellowing.
• Paper Manufacturing: For brightening high-quality writing, printing, and tissue papers to achieve a brilliant white finish.
• Textile & Fiber Treatment: Applied in the finishing process of cotton, nylon, and other synthetic fibers to improve whiteness.
• Plastics and Polymers: Incorporated into polymers, adhesives, and coatings to offset inherent yellowness and enhance visual appeal.
• Advanced Coatings & Paints: Used in formulations where a high degree of whiteness and brightness is required under various lighting conditions.

Basic Information

Item	Detail
Product Name	Octasodium 2,2'-[Vinylenebis[(3-Sulphonato-4,1-Phenylene)Imino[6-[Methyl(2-Sulphonatoethyl)Amino]-1,3,5-Triazine-4,2-Diyl]Imino]]Bis(Benzene-1,4-Disulphonate)
CAS No.	93778-01-9
Molecular Formula	C46H28N12Na8O24S8
Molecular Weight	~1550 g/mol (Contact for exact details)
Synonyms	Fluorescent Brightener 351; Tinopal CBS-X; FWA 351; Stilbene triazine-based optical brightener; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis(2-sulfoethyl)amino]-6-(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid octasodium salt; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[[4-[bis(2-sulfoethyl)amino]-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-, octasodium salt; Optical Brightening Agent OBA 351
EINECS	Contact for details

Quality Control

Our production of this fluorescent whitening agent adheres to strict quality management protocols. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and assay, spectrophotometry for strength and shade, and checks for insolubles and heavy metals. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to ensure traceability and compliance with your quality requirements.

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 after opening to prevent moisture absorption, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellowish-green powder or granules
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	Min. 95.0%
Strength (Spectrophotometry)	100 ± 3% of standard
Moisture (Karl Fischer)	Max. 5.0%
Water Solubility	Clear solution at 1%
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	Max. 20 ppm

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