Description

Fluorescent Brightener 101 is a high-performance stilbene derivative optical brightening agent (OBA) widely used to enhance the whiteness and brightness of materials. Its core value lies in its ability to absorb ultraviolet light and re-emit it as visible blue light, effectively counteracting yellowing and creating a visually superior, brighter white appearance. This compound is essential for manufacturers in the textile, paper, and detergent industries seeking to improve product aesthetics and market appeal. Consistent quality and reliable supply are critical for maintaining uniform optical effects in large-scale production runs.

Application

• Textile Finishing: Applied to cotton, nylon, and polyester fabrics to achieve high whiteness grades, particularly in white and pastel-colored goods.
• Paper Manufacturing: Incorporated into pulp or coatings for high-quality writing, printing, and specialty papers to enhance brightness and opacity.
• Laundry Detergents & Fabric Softeners: A key ingredient in premium detergent formulations to impart a "whiter-than-white" look to laundered fabrics.
• Plastics and Polymers: Used in the production of white or light-colored plastics, such as PVC and polyolefins, to improve visual appeal.
• Soaps and Personal Care Products: Added to certain soaps and cosmetic formulations to boost perceived cleanliness and brightness.
• Synthetic Fibers: Employed in the spin-finish or during the polymerization process for man-made fibers like polyester and polyamide.

Basic Information

Product Name	Fluorescent Brightener 101
CAS No.	51848-34-1
Molecular Formula	C₄₀H₄₂N₁₂O₆S₂
Molecular Weight	843.0 g/mol
Synonyms	2,2'-(1,2-Ethenediyl)bis[5-[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid; Tinopal 5BM; Blankophor BSU; Fluorescent Brightener 5BM; FB 101; Optical Brightener 101; 4,4'-Bis[(4-anilino-6-bis(2-hydroxyethyl)amino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid; Stilbene brightener 5BM
EINECS	257-456-7

Quality Control

Our Fluorescent Brightener 101 is manufactured under a stringent quality management system. Every batch is tested to ensure it meets precise specifications for purity, strength, and performance characteristics such as hue and fluorescence intensity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee traceability and compliance with your quality standards.

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. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellowish powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Moisture Content	≤ 2.0%
Ash Content	≤ 0.5%
Fluorescence Intensity	≥ 95% of reference standard
Shade (vs. Std.)	Similar
Solubility (in water)	Clear, yellow solution

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