Description

Dicalcium Hydrogen -4,4'-Bis[[4-[(2-Hydroxyethyl)Amino]-6-[(3-Sulphonatophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance, water-soluble fluorescent whitening agent (FWA) belonging to the stilbene-triazine class. This compound is engineered to deliver exceptional optical brightening effects on cellulosic and polyamide fibers, significantly enhancing whiteness and brightness under UV light. It is a critical raw material for manufacturers in the textile, paper, and detergent industries seeking to improve the visual appeal and perceived cleanliness of their products.

Application

• Textile Finishing: Primary application for whitening cotton, viscose, and other cellulosic fabrics during bleaching or in finishing baths.
• Paper Manufacturing: Used in coating formulations and pulp to achieve high-grade brightness in fine papers, art papers, and board.
• Detergent & Laundry Care: Incorporated into premium laundry detergents, fabric softeners, and soaps to impart a "whiter-than-white" appearance to laundered textiles.
• Polyamide & Wool Processing: Effective brightener for nylon and wool fibers, providing excellent affinity and light fastness.
• Synthetic Fiber Production: Applied in the spin-dyeing process for man-made fibers to achieve inherent whiteness.
• Industrial & Specialty Coatings: Used in specific coating applications where optical brightening is required for plastics or surface treatments.

Basic Information

Product Name	Dicalcium Hydrogen -4,4'-Bis[[4-[(2-Hydroxyethyl)Amino]-6-[(3-Sulphonatophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	84681-96-9
Molecular Formula	C52H46Ca2N16O18S4
Molecular Weight	1367.4 g/mol (approx.)
Synonyms	Fluorescent Brightener 220 (FB 220); Tinopal CBS-X; Dicalcium 4,4'-bis[[4-[(2-hydroxyethyl)amino]-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonate; C.I. Fluorescent Brightener 220; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(2-hydroxyethyl)amino]-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid], calcium salt (1:2); Optical Brightener CBS-X; FWA CBS-X
EINECS	Contact for details

Quality Control

Our production of Dicalcium Hydrogen -4,4'-Bis[[4-[(2-Hydroxyethyl)Amino]-6-[(3-Sulphonatophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to stringent quality management systems. Every batch is analyzed using advanced techniques like HPLC and spectrophotometry to ensure consistent high purity, strength, and chromaticity. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are provided to guarantee compliance with your 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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Whiteness Degree (on cotton)	≥ 150 (ISO Standard)
Solubility in Water	Clear, complete solution
Heavy Metals (as Pb)	≤ 20 ppm

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