Description

Tetrasodium 2-[4-[2-(4-Amino-2-Sulphonatophenyl)Vinyl]-3-Sulphonatophenyl]-2H-Naphtho[1,2-D]Triazole-6,8-Disulphonate is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the triazole-stilbene chemical class. This compound is engineered to provide exceptional optical brightening effects 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 component for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior product aesthetics and performance in a competitive global market.

Application

This specialized fluorescent whitening agent is designed for high-performance applications where brilliant whiteness and light fastness are paramount.

• Textile Finishing: For whitening and brightening cotton, nylon, wool, and synthetic fibers during scouring, bleaching, or finishing processes.
• Laundry Detergents & Fabric Softeners: As a key additive in premium powder and liquid detergents to impart a "whiter-than-white" appearance to laundered fabrics.
• Paper Manufacturing: To enhance the brightness of high-quality writing, printing, and tissue papers, often applied in the coating or pulp slurry.
• Plastics and Synthetic Fibers: For the mass pigmentation of polymers like polyamide (nylon), polyester, and PVC to correct yellowness and improve visual appeal.
• Soaps and Personal Care Products: Used in certain formulations to improve the whiteness of bar soaps and other cosmetic bases.
• Advanced Coatings: Incorporated into specific coating formulations where optical brightness is required.

Basic Information

Product Name	Tetrasodium 2-[4-[2-(4-Amino-2-Sulphonatophenyl)Vinyl]-3-Sulphonatophenyl]-2H-Naphtho[1,2-D]Triazole-6,8-Disulphonate
CAS No.	67875-19-8
Molecular Formula	C30H18N4Na4O14S4
Molecular Weight	924.70 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; 2,2'-(1,2-Ethenediyl)bis[5-[4-[4,6-bis(sodiooxy)-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]benzoxazole disodium salt (related isomer); C.I. Fluorescent Brightener 220; FWA 220; 4,4'-Bis[(4,6-dianilino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid tetrasodium salt (common parent structure reference); Triazinylaminostilbene disulfonic acid derivative; Optical Brightener OB-1 (industry generic).
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 2-[4-[2-(4-Amino-2-Sulphonatophenyl)Vinyl]-3-Sulphonatophenyl]-2H-Naphtho[1,2-D]Triazole-6,8-Disulphonate adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and assay, spectrophotometry for strength and shade, and checks for insolubles and heavy metals. Certificates of Analysis (COA) documenting all critical parameters are provided to ensure traceability and compliance with your specific application requirements and global regulatory standards.

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). This material is hygroscopic (moisture-sensitive); the original container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials.

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
Water Solubility	Clear solution at 1%
Heavy Metals (as Pb)	≤ 20 ppm
Fluorescent Strength	98 - 102% (vs. Standard)

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