Description

Tetrasodium 4,4'-Bis[[4-[(2-Carbamoylethyl)(2-Hydroxyethyl)Amino]-6-(p-Sulphonatoanilino)-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. It is engineered to deliver exceptional optical brightening effects on cellulosic and polyamide fibers, significantly enhancing the perceived whiteness and brightness of textiles under UV light. This product is essential for manufacturers in the textile, detergent, and paper industries seeking to achieve superior product aesthetics and meet stringent quality standards for whiteness.

Application

• Textile Finishing: Primary application for whitening cotton, viscose, and other cellulosic fibers during bleaching or finishing processes.
• Detergent Formulation: Key additive in laundry detergents and fabric softeners to impart a "whiter-than-white" appearance to laundered fabrics.
• Paper Manufacturing: Used in the production of high-quality writing, printing, and specialty papers to improve brightness and opacity.
• Polyamide Whitening: Effective for brightening nylon and other polyamide materials.
• Industrial Coatings & Plastics: Incorporated into coatings and certain polymers where optical brightening is required.

Basic Information

Item	Detail
Product Name	Tetrasodium 4,4'-Bis[[4-[(2-Carbamoylethyl)(2-Hydroxyethyl)Amino]-6-(p-Sulphonatoanilino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	29637-52-3
Molecular Formula	C52H48N16Na4O20S6
Molecular Weight	~1553.3 g/mol
Synonyms	Fluorescent Brightener 220 (FBA 220); Tinopal CBS-X; Blankophor BSU liq.; Stilbene-based Optical Brightener; 4,4'-Bis[[4-[(2-Carbamoylethyl)(2-hydroxyethyl)amino]-6-(4-sulfonatoanilino)-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonate, tetrasodium salt; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(2-carbamoylethyl)(2-hydroxyethyl)amino]-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid], tetrasodium salt; C.I. Fluorescent Brightener 220; FWA 220
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 4,4'-Bis[[4-[(2-Carbamoylethyl)(2-Hydroxyethyl)Amino]-6-(p-Sulphonatoanilino)-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and strength, spectrophotometry for color and fluorescence properties, and verification of physical parameters. Certificates of Analysis (COA) documenting batch-specific results are available upon request to ensure transparency and support your quality assurance processes.

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 to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Yellowish to off-white powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Water Solubility	Completely soluble
Fluorescence Intensity	Compared to standard (≥ 98%)
Heavy Metals (as Pb)	≤ 20 ppm

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