Description

Trisodium 2-[3-Sulphonato-4-[2-[2-Sulphonato-4-(1H-1,2,3-Triazol-1-Yl)Phenyl]Vinyl]Phenyl]-2H-Naphtho[1,2-D]Triazole-6-Sulphonate is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the triazole-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 perceived whiteness and brightness of materials. This compound is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior optical brightening effects in their products.

Application

• Textile Finishing: As a key optical brightener for synthetic fibers like polyester, nylon, and acetate, as well as their blends, providing a brilliant white appearance.
• Laundry Detergent Formulation: Incorporated into premium powder and liquid detergents to compensate for fabric yellowing and deliver a "whiter-than-white" look on white and colored fabrics.
• Paper Manufacturing: Used in the production of high-quality writing, printing, and specialty papers to increase brightness and opacity, reducing the need for costly blue dyes.
• Plastics and Polymer Processing: Applied as an additive in the manufacture of plastics, films, and coatings to correct inherent yellowness and improve aesthetic appeal.
• Advanced Material Coatings: Utilized in formulations for paints, inks, and other coatings where optical brightness is a critical performance parameter.

Basic Information

Product Name	Trisodium 2-[3-Sulphonato-4-[2-[2-Sulphonato-4-(1H-1,2,3-Triazol-1-Yl)Phenyl]Vinyl]Phenyl]-2H-Naphtho[1,2-D]Triazole-6-Sulphonate
CAS No.	85154-03-6
Molecular Formula	C31H18N6Na3O12S4
Molecular Weight	912.78 g/mol
Synonyms	Tinopal CBS-X; Fluorescent Brightener 351; 2,2'-(1,2-Ethenediyl)bis[5-[1H-1,2,3-triazol-1-yl]benzenesulfonic acid] derivative; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-(1H-1,2,3-triazol-1-yl)-, sodium salt (1:3); Optical Brightener CBS-X; FWA 351; 4,4'-Bis(1,2,3-triazol-1-yl)-2,2'-stilbenedisulfonic acid trisodium salt; CI Fluorescent Brightener 351
EINECS	Contact for details

Quality Control

Our production of this fluorescent whitening agent adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Every lot is analyzed for key parameters including purity, shade, and solubility to meet precise customer specifications. A comprehensive Certificate of Analysis (COA) detailing assay results, physical properties, and spectral identification (UV-Vis, IR) is provided with each shipment to support your quality assurance protocols.

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); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect performance and flow characteristics.

Specification

Item	Specification
Appearance	Yellowish 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	Contact for details
Fluorescence Intensity	Compared to standard

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