Description

Ammonium Sodium 4,4'-Bis[[4-Amino-6-Anilino-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 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 additive 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 to achieve high-visibility, vibrant whites.
• Paper Manufacturing: Used in high-quality writing, printing, and specialty papers to improve brightness and opacity, reducing the need for costly blue dyes.
• Laundry Detergents & Fabric Softeners: A key ingredient in premium liquid and powder detergents to impart a "whiter-than-white" appearance to laundered garments.
• Plastics and Synthetic Fibers: Incorporated during polymer processing to brighten plastics, acrylics, and polyamide fibers for applications in packaging and textiles.
• Cosmetics and Personal Care: Employed in certain formulations, such as soaps and body washes, to enhance the visual appeal of the product itself.
• Coatings and Paints: Used in specific industrial coatings and white paints to improve initial brightness and counteract yellowing.

Basic Information

Product Name	Ammonium Sodium 4,4'-Bis[[4-Amino-6-Anilino-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	85169-38-6
Molecular Formula	C40H34N14Na2O6S2 • xNH4
Molecular Weight	~960-1000 g/mol (base form, variable with ammonium content)
Synonyms	Fluorescent Brightener 220; FWA 220; Tinopal CBS-X; Stilbene triazine fluorescent whitening agent; 4,4'-Bis[(4-anilino-6-amino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid sodium ammonium salt; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(4-aminophenyl)amino]-6-amino-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] sodium ammonium salt; Optical Brightener OB-1 (industry-specific); CBS-X (common trade abbreviation)
EINECS	Contact for details

Quality Control

Our Ammonium Sodium 4,4'-Bis[[4-Amino-6-Anilino-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is manufactured under a strict quality management system. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and assay, spectrophotometry for strength and shade, and tests for solubility and ionic content. A Certificate of Analysis (COA) detailing all specifications is provided to ensure traceability and 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect performance and flow characteristics.

Specification

Item	Specification
Appearance	Light yellow to yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Strength (Spectrophotometry)	100 ± 3% of standard
Moisture Content (Karl Fischer)	≤ 5.0%
Ash Content	≤ 0.5%
Solubility in Water	Clear, yellow solution at 1%
pH (1% aqueous solution)	7.0 - 9.0

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