Description

Disodium 4,4'-Bis[[4-[(2-Hydroxypropyl)Amino]-6-Methoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene disulfonate class. Its primary value lies in its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, thereby compensating for yellowish tints and significantly 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 finished products.

Application

• Textile Finishing: As a key optical brightener for cotton, nylon, wool, and synthetic fibers during washing, bleaching, or finishing processes.
• Laundry Detergents & Fabric Softeners: Incorporated into powder and liquid detergent formulations to impart a "whiter-than-white" appearance to laundered fabrics.
• Paper Manufacturing: Used in the coating or mass coloration of high-quality writing, printing, and specialty papers to improve brightness and opacity.
• Plastics and Polymers: Applied as a whitening agent for synthetic fibers (like polyester), PVC, and other polymers to counteract inherent yellowness.
• Soaps and Personal Care: Employed in certain soap bars and cosmetic formulations where a brightening effect is desired.
• Advanced Material Coatings: Potential use in coatings and inks where fluorescence and brightness enhancement are required.

Basic Information

Item	Detail
Product Name	Disodium 4,4'-Bis[[4-[(2-Hydroxypropyl)Amino]-6-Methoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	20179-35-5
Molecular Formula	C34H38N12Na2O12S2
Molecular Weight	924.85 g/mol
Synonyms	Fluorescent Brightener 220 (FBA 220); Tinopal UNPA-GX; Disodium 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate derivative; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(2-hydroxypropyl)amino]-6-methoxy-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] disodium salt; Optical Brightener OB-1 (industry variant); Stilbene triazine brightener; 4,4'-Bis[(4-anilino-6-(N-2-hydroxypropyl-N-methylamino)-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 4,4'-Bis[[4-[(2-Hydroxypropyl)Amino]-6-Methoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent performance, including assay (HPLC), absorbance/fluorescence intensity, shade evaluation, and moisture content. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to guarantee traceability and compliance with your technical 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) and light-sensitive; prolonged exposure to moisture or direct light may affect its performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Light yellow to yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture (Karl Fischer)	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Absorbance (UV-Vis)	Conforms to typical range
Fluorescence Intensity	≥ 95% of reference standard
Ash Content	≤ 0.5%

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