Description

Disodium 4,4'-Bis[[4-[(2-Hydroxyethyl)Amino]-6-Phenoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate is a high-performance fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene 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 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. CAS No. 4028-30-2.

Application

This advanced fluorescent whitening agent is designed for a wide range of industrial applications where enhanced whiteness and brightness are paramount.

• Textile Finishing: Primary application for whitening and brightening cotton, polyester, nylon, and blended fabrics during scouring, bleaching, or finishing processes.
• Detergent & Laundry Care: A key ingredient in premium laundry detergents, powders, and liquids to impart a "whiter-than-white" appearance to laundered fabrics.
• Paper Manufacturing: Used in the production of high-quality writing, printing, and specialty papers to improve brightness and opacity, reducing the need for costly blue dyes.
• Plastics and Polymers: Incorporated into polymers like PVC, polyethylene, and polypropylene to counteract yellowing and improve the visual appeal of finished plastic products.
• Synthetic Fiber Production: Applied in the spin finish or mass coloration of synthetic fibers such as polyester and polyamide to achieve inherent brightness.
• Coating and Ink Formulations: Utilized in certain coatings and inks to provide optical brightening effects and improve color vibrancy.

Basic Information

Item	Detail
Product Name	Disodium 4,4'-Bis[[4-[(2-Hydroxyethyl)Amino]-6-Phenoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate
CAS No.	4028-30-2
Molecular Formula	C40H34N12Na2O10S2
Molecular Weight	936.87 g/mol
Synonyms	Fluorescent Brightener 220; Tinopal CBS-X; Blankophor BSU; 4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt (related structure); Disodium 4,4'-bis(4-phenylamino-6-morpholino-1,3,5-triazin-2-yl)aminostilbene-2,2'-disulfonate (common variant); FWA 220; Optical Brightener OB-1; Stilbene triazine brightener.
EINECS	223-709-7

Quality Control

Our production of Disodium 4,4'-Bis[[4-[(2-Hydroxyethyl)Amino]-6-Phenoxy-1,3,5-Triazin-2-Yl]Amino]Stilbene-2,2'-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for strength and hue, and checks for key physical parameters. We ensure consistency and performance reliability for industrial applications. Certificates of Analysis (COA) documenting purity, assay, and other critical specifications are available upon request.

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 material is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed after opening to prevent moisture absorption and degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellowish to off-white powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Ash Content	≤ 0.5%
Fluorescent Strength	100 ± 5% (vs. Standard)
Shade	Standard Blue-White

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