Description

4,4'-Bis[[4-[Bis(2-Hydroxyethyl)Amino]-6-[(4-Sulphophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonic Acid, Potassium Sodium Salt is a high-performance fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene disulfonate class. This compound is engineered to deliver exceptional optical brightness and color correction by absorbing ultraviolet light and re-emitting it as visible blue light. It is a critical additive for manufacturers in the detergent, paper, textile, and plastics industries seeking to enhance the perceived whiteness and brightness of their products. Its specific chemical structure provides excellent substantivity and stability under various application conditions.

Application

• Detergent & Laundry Care: Primary application as a key optical brightener in laundry detergents, powders, and liquids to impart a brilliant white appearance to fabrics.
• Paper Manufacturing: Used in the coating and sizing of high-quality papers, including writing, printing, and art papers, to achieve superior brightness and opacity.
• Textile Finishing: Applied in the finishing baths for cotton, nylon, and other fibers to compensate for yellowish tints and improve the visual appeal of white textiles.
• Plastics & Polymers: Incorporated into synthetic fibers (e.g., polyamide, polyester) and plastic masterbatches to correct yellowness and enhance whiteness.
• Soap & Personal Care: Utilized in the formulation of soaps, shower gels, and cosmetic products where a bright, clean visual profile is desired.
• Advanced Coatings: Functions as a whitening agent in specialty coatings and paints where UV stability and color enhancement are required.

Basic Information

Product Name	4,4'-Bis[[4-[Bis(2-Hydroxyethyl)Amino]-6-[(4-Sulphophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonic Acid, Potassium Sodium Salt
CAS No.	72187-40-7
Molecular Formula	C52H54K2N16Na2O18S4
Molecular Weight	~1413.5 g/mol
Synonyms	Fluorescent Brightener 220; FWA 220; Tinopal CBS-X; Stilbene triazine fluorescent whitening agent; 4,4'-Bis(4-anilino-6-bis(2-hydroxyethyl)amino-1,3,5-triazin-2-yl)amino stilbene-2,2'-disulfonic acid potassium sodium salt; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis(2-hydroxyethyl)amino]-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] potassium sodium salt; Optical Brightener OB-1 (industry-specific); CBS-X (common trade name abbreviation)
EINECS	Contact for details

Quality Control

Our production of this fluorescent whitening agent adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as active content, hue, and solubility are rigorously tested. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with every shipment to 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 product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after initial use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Yellowish to light yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Ash Content	≤ 15.0%
Whiteness Degree	Standard sample comparison
Solubility in Water	Clear, yellowish solution

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