Description

4,4'-Bis[[4-[(2-Hydroxyethyl)methylamino]-6-methoxy-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulphonic acid is a high-performance fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene class. Its primary value lies in its exceptional ability to absorb UV light and re-emit it as visible blue light, thereby compensating for yellowing and enhancing the perceived whiteness and brightness of materials. This compound is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior optical brightening effects in their products.

Application

• Textile Finishing: As a key optical brightener for cotton, linen, and synthetic fibers during washing or finishing processes.
• Paper Manufacturing: To increase the whiteness and brightness of high-quality papers, including writing, printing, and tissue grades.
• Detergent Formulation: Incorporated into laundry detergents and fabric softeners to impart a "whiter-than-white" appearance to laundered fabrics.
• Plastics and Polymers: Used as an additive in the production of plastics, synthetic fibers (like polyamides), and coatings to improve visual appeal.
• Soaps and Personal Care: Employed in certain soap bars and cosmetic formulations where a brightening effect is desired.
• Advanced Material Coatings: Potential use in specialty coatings and inks requiring fluorescence or optical enhancement.

Basic Information

Product Name	4,4'-Bis[[4-[(2-Hydroxyethyl)methylamino]-6-methoxy-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulphonic Acid
CAS No.	60501-28-2
Molecular Formula	C34H40N12O10S2
Molecular Weight	840.89 g/mol
Synonyms	Fluorescent Brightener 220; FWA 220; Tinopal CBS-X; Stilbene triazine fluorescent whitening agent; 4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid (related structure); 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(2-hydroxyethyl)methylamino]-6-methoxy-1,3,5-triazin-2-yl]amino]benzenesulfonic acid]; Optical Brightener OB-1; Bis(triazinylamino)stilbene disulfonate derivative
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. Quality is verified through analytical methods including HPLC for assay and impurity profiling, UV-Vis spectroscopy for strength assessment, and other relevant physicochemical tests. A comprehensive Certificate of Analysis (COA) detailing purity, appearance, and specific performance indicators is provided with each shipment to guarantee it meets 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). Keep away from incompatible materials and direct heat sources. The product is light-sensitive and should be stored away from light to maintain stability.

Specification

Item	Specification
Appearance	Light yellow to yellowish powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Ash Content	≤ 0.5%
pH (1% Solution)	7.0 - 9.0
Fluorescent Strength	100 ± 5% (vs. Standard)
Solubility in Water	Partially soluble; forms colloidal dispersion

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