Description

Trisodium 2-[4-[2-(4-Amino-2-Sulphonatophenyl)Vinyl]-3-Sulphonatophenyl]-2H-Naphtho[1,2-D]Triazole-5-Sulphonate is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the triazole-stilbene chemical class. This compound is engineered to deliver exceptional optical brightening performance by absorbing ultraviolet light and re-emitting it as visible blue light, thereby enhancing the perceived whiteness and brightness of materials. It is a critical additive for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior product aesthetics and market competitiveness.

Application

This fluorescent whitening agent is designed for high-performance applications where brilliant whiteness and light fastness are paramount. Its excellent solubility and affinity make it suitable for a wide range of industrial processes.

• Textile Finishing: Primary application for whitening and brightening cotton, nylon, wool, and synthetic fibers during scouring, bleaching, or finishing baths.
• Paper Manufacturing: Used in coating formulations and pulp slurry to achieve high-grade brightness in printing, writing, and specialty papers.
• Detergent & Laundry Care: A key ingredient in premium liquid and powder detergents, fabric softeners, and soaps to impart a "whiter-than-white" appearance to laundered fabrics.
• Plastics and Polymers: Incorporated into polymers like PVC, polyethylene, and polypropylene to correct yellowness and improve the visual appeal of finished plastic products.
• Advanced Coatings: Used in paints, varnishes, and other coating systems to enhance brightness and opacity.
• Synthetic Fibers: Applied during the spinning process of fibers like polyester and polyamide to achieve inherent whiteness.

Basic Information

Product Name	Trisodium 2-[4-[2-(4-Amino-2-Sulphonatophenyl)Vinyl]-3-Sulphonatophenyl]-2H-Naphtho[1,2-D]Triazole-5-Sulphonate
CAS No.	63503-96-8
Molecular Formula	C30H18N4Na3O9S3
Molecular Weight	760.61 g/mol
Synonyms	Fluorescent Brightener 220; FB 220; Tinopal CBS-X; 2,2'-(1,2-Ethenediyl)bis[5-[4-[4,5-dihydro-6-methyl-5-(oxido-oxo-sulfanylidene)-2H-naphtho[1,2-d][1,2,3]triazol-2-yl]phenyl]benzenesulfonic acid trisodium salt; C.I. Fluorescent Brightener 220; 4,4'-Bis[[4-[4,5-dihydro-6-methyl-5-(oxido-oxo-sulfanylidene)-2H-naphtho[1,2-d]triazol-2-yl]phenyl]amino]stilbene-2,2'-disulfonic acid trisodium salt; Triazole type fluorescent whitening agent; Optical brightener OB-1 (related class).
EINECS	Contact for details

Quality Control

Our production of Trisodium 2-[4-[2-(4-Amino-2-Sulphonatophenyl)Vinyl]-3-Sulphonatophenyl]-2H-Naphtho[1,2-D]Triazole-5-Sulphonate adheres to a stringent quality management system to ensure batch-to-batch consistency and performance reliability. The product is manufactured and tested in compliance with relevant industry standards for optical brighteners. Certificates of Analysis (COA) documenting key parameters such as purity, absorbance, and hue are provided with every shipment to guarantee it meets your specific application 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 (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect performance and flow characteristics.

Specification

Item	Specification
Appearance	Yellowish to light brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Absorbance (UV-Vis)	Conforms to typical range
Whiteness Degree	Standard fabric test available
Heavy Metals (as Pb)	≤ 20 ppm

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