Description

Fluorescent Brightener 1 is a high-performance stilbene derivative optical brightening agent (OBA) designed to enhance the whiteness and brightness of substrates. Its core value lies in its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, effectively counteracting yellowing and creating a brilliant, clean visual appearance. This product is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to improve the aesthetic quality and perceived value of their finished goods.

Application

• Textile Finishing: Widely used for whitening and brightening natural and synthetic fibers like cotton, polyester, and polyamide in both batch and continuous processes.
• Laundry Detergents & Fabric Softeners: A key additive in household and industrial detergents to impart a "whiter-than-white" look to laundered fabrics.
• Paper Manufacturing: Applied in coating formulations and pulp to achieve high brightness levels in fine papers, tissues, and board.
• Plastics and Polymers: Incorporated into polymers such as PVC, polyethylene, and polystyrene to correct inherent yellowness and improve the color of molded articles and films.
• Soaps and Personal Care: Used in certain soap bars and cosmetic formulations to enhance product whiteness.
• Synthetic Leather & Coatings: Employed in coatings and synthetic leather production to improve brightness and visual appeal.

Basic Information

Product Name	Fluorescent Brightener 1
CAS No.	15339-39-6
Molecular Formula	C₂₈H₂₀N₂O₂S₂
Molecular Weight	480.60 g/mol
Synonyms	4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid; Fluorescent Brightener 220; Tinopal UNPA-GX; Blankophor BSU; CBS 220; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid]; Stilbene Brightener 220; Optical Brightener OB-1
EINECS	239-376-2

Quality Control

Our Fluorescent Brightener 1 is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent performance, including HPLC assay for purity, spectrophotometric analysis for strength, and tests for solubility and shade. Certificates of Analysis (COA) detailing all relevant specifications are available upon request to support your quality assurance protocols.

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. Under these conditions, the product has excellent shelf stability.

Specification

Item	Specification
Appearance	Yellowish-green powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Strength (Spectrophotometric)	100 ± 3%
Moisture Content	≤ 5.0%
Ash Content	≤ 0.5%
Solubility in Water	Partially soluble; forms a colloidal dispersion
pH (1% Dispersion)	7.0 - 9.0

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