Description

Disodium 4,4'-Bis[[6-Anilino-4-[(2-Hydroxyethyl)Methylamino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene class. It matters because it provides exceptional optical brightening effects, enhancing the perceived whiteness and brightness of materials under UV light. This product is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to improve the visual appeal and marketability of their finished goods.

Application

• Textile Finishing: Primary application for whitening and brightening natural and synthetic fibers like cotton, polyester, and polyamide.
• Paper Manufacturing: Used in coating formulations and pulp to achieve high-grade brightness in printing and writing papers.
• Laundry Detergents & Fabric Softeners: A key additive in household and industrial detergents to impart a "whiter-than-white" look to laundered fabrics.
• Plastics and Polymers: Incorporated into polymers such as PVC, polyethylene, and polystyrene to correct yellowness and improve aesthetic quality.
• Soaps and Personal Care Products: Used in certain soap bars and cosmetic formulations where a brightening effect is desired.
• Advanced Coatings: Formulated into specialty paints and coatings that require optical brightening properties.

Basic Information

Product Name	Disodium 4,4'-Bis[[6-Anilino-4-[(2-Hydroxyethyl)Methylamino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	13863-31-5
Molecular Formula	C₄₆H₄₄N₁₂Na₂O₁₀S₂
Molecular Weight	1050.99 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; Blankophor BSU liq.; Disodium 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate (related structure); 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(2-hydroxyethyl)methylamino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] disodium salt; Stilbene triazine fluorescent whitening agent; FWA 220; Optical Brightener OB-1 (industry term).
EINECS	237-630-4

Quality Control

Our Disodium 4,4'-Bis[[6-Anilino-4-[(2-Hydroxyethyl)Methylamino]-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent performance in brightness, hue, and solubility. Key parameters such as purity, ash content, and heavy metals are controlled. Certificates of Analysis (COA) documenting all test results are provided with each shipment to guarantee compliance with your specifications.

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 heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct sunlight or strong artificial light should be avoided to maintain product efficacy.

Specification

Item	Specification
Appearance	Yellowish-green powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Ash Content (Sulfated)	≤ 0.5%
pH (1% Solution)	7.0 - 9.0
Whiteness Degree (on standard fabric)	≥ 120 (or as agreed)
Solubility in Water	Clear, yellowish solution

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