Description

Tetrasodium 2-[4-[2-[4-[(3-Amino-2-Methoxy-5-Methylphenyl)Azo]-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 deliver exceptional optical brightening effects by absorbing ultraviolet light and re-emitting it as visible blue light, thereby enhancing the perceived whiteness and brightness of treated materials. It is a critical component for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior product aesthetics and market competitiveness.

Application

• Textile Finishing: Primary application for whitening and brightening cotton, nylon, polyester, and blended fabrics during scouring, bleaching, or finishing processes.
• Laundry Detergents & Fabric Softeners: Key ingredient in premium powder and liquid detergents to impart a "whiter-than-white" appearance to laundered garments.
• Paper Manufacturing: Used in coating formulations and pulp treatment to achieve high brightness grades in fine papers, tissues, and board.
• Plastics and Synthetic Fibers: Incorporated into polymer matrices (e.g., PVC, polyolefins) and synthetic fibers like polyamide to correct yellowness and improve visual appeal.
• Soaps and Personal Care: Employed in the production of bar soaps, liquid soaps, and certain cosmetic formulations to enhance product whiteness.
• Advanced Material Coatings: Utilized in specialty coatings and paints where optical brightening properties are required.

Basic Information

Item	Details
Product Name	Tetrasodium 2-[4-[2-[4-[(3-Amino-2-Methoxy-5-Methylphenyl)Azo]-2-Sulphonatophenyl]Vinyl]-3-Sulphonatophenyl]-2H-Naphtho[1,2-D]Triazole-6,8-Disulphonate
CAS No.	67875-23-4
Molecular Formula	C39H28N6Na4O16S4
Molecular Weight	1088.9 g/mol (approx.)
Synonyms	Fluorescent Brightener 220; FWA 220; Tinopal CBS-X; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(3-amino-2-methoxy-5-methylphenyl)azo]-2-sulfophenyl]vinyl]benzenesulfonic acid, tetrasodium salt; C.I. Fluorescent Brightener 220; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[[4-[(3-amino-2-methoxy-5-methylphenyl)azo]-2-sulfophenyl]vinyl]-, sodium salt (1:4); 4,4'-Bis[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid derivative (related class).
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 2-[4-[2-[4-[(3-Amino-2-Methoxy-5-Methylphenyl)Azo]-2-Sulphonatophenyl]Vinyl]-3-Sulphonatophenyl]-2H-Naphtho[1,2-D]Triazole-6,8-Disulphonate adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and assay, spectrophotometry for strength and shade, and checks for heavy metals and other impurities to ensure consistency and performance. Certificates of Analysis (COA) documenting all critical parameters are available upon request 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 a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the original container must be kept tightly sealed after use to prevent absorption of atmospheric moisture, which can affect performance and handling properties.

Specification

Item	Specification
Appearance	Yellowish to light brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95.0%
Moisture Content	Max. 5.0%
pH (1% Solution)	7.0 - 9.5
Ash Content (as Sulfate)	28.0 - 32.0%
Heavy Metals (as Pb)	Max. 20 ppm
Solubility in Water	Completely soluble

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