Description

Dipotassium Disodium 4,4'-Bis[[4-Chloro-6-[(4-Sulphonatophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-purity, water-soluble fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene disulfonate 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, linen, nylon, and wool fibers during scouring, bleaching, or finishing processes.
• Laundry Detergent Formulation: Key ingredient in premium liquid and powder detergents to impart a "whiter-than-white" appearance to laundered fabrics.
• Paper Manufacturing: Used in the production of high-quality writing, printing, and tissue papers to achieve high brightness and opacity standards.
• Plastics and Synthetic Fibers: Incorporated into polymers like polyamide (nylon) and polyester to correct yellowness and enhance visual appeal in final products.
• Soaps and Personal Care Products: Added to certain cosmetic and soap formulations to improve brightness and color consistency.
• Advanced Coating Systems: Utilized in specialty coatings and paints where optical brightening properties are required.

Basic Information

Product Name	Dipotassium Disodium 4,4'-Bis[[4-Chloro-6-[(4-Sulphonatophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	68155-68-0
Molecular Formula	C40H26Cl2K2N12Na2O14S4
Molecular Weight	1195.04 g/mol
Synonyms	Fluorescent Brightener 220 (FB 220); Tinopal CBS-X; 4,4'-Bis[[4-chloro-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonic acid, dipotassium disodium salt; Stilbene triazine fluorescent whitening agent; Optical Brightener 220; FWA 220; Disodium Dipotassium 4,4'-Bis(2-sulfo-4-[4-chloro-6-(4-sulfonatoanilino)-1,3,5-triazin-2-yl]aminostilbene-2,2'-disulfonate); C.I. Fluorescent Brightener 220
EINECS	Contact for details

Quality Control

Our production of Dipotassium Disodium 4,4'-Bis[[4-Chloro-6-[(4-Sulphonatophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Every lot is tested against rigorous in-house specifications for key parameters including purity, color strength, hue, and solubility. Certificates of Analysis (COA) documenting these results are provided with every 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 material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Light yellow to yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture (Karl Fischer)	≤ 5.0%
Ash Content	≤ 0.5%
pH (1% Aqueous Solution)	7.0 - 9.0
Water Solubility	Clear solution at 1% w/v

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