Description

Fluorescent Brightener 206 is a high-performance stilbene derivative optical brightening agent (OBA) with the CAS registry number 12642-93-2. It is engineered to absorb ultraviolet light and re-emit it as visible blue light, effectively compensating for yellowing and enhancing the perceived whiteness and brightness of substrates. This agent is essential for manufacturers in the plastics, synthetic fibers, and detergent industries seeking to achieve superior visual quality and market appeal for their products.

Application

Fluorescent Brightener 206 is widely utilized across industries where optical enhancement is critical. Its primary function is to impart a brilliant white and bright appearance to various materials.

• Plastics and Polymers: Masterbatch and compound formulation for PVC, PP, PE, ABS, and engineering plastics to achieve high whiteness.
• Synthetic Fibers: Brightening agent for polyester, nylon, and acetate fibers during spinning or in downstream finishing processes.
• Detergents and Laundry Care: A key additive in laundry detergents, fabric softeners, and soaps to make white fabrics appear cleaner and brighter.
• Paper and Pulp: Application in coating formulations and pulp to improve the brightness grade of high-quality papers.
• Coatings and Inks: Used in varnishes, lacquers, and printing inks to enhance optical properties and color vibrancy.
• Textile Auxiliaries: Incorporated into finishing agents for textiles to provide a lasting brightening effect.

Basic Information

Product Name	Fluorescent Brightener 206
CAS No.	12642-93-2
Molecular Formula	C40H38N12O8S2Na2
Molecular Weight	924.91 g/mol
Synonyms	Tinopal CBS-X; 2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole disulfonic acid disodium salt; 4,4'-Bis(2-sulfostyryl)biphenyl disodium salt; Fluorescent Brightener CBS-X; FBA 206; Optical Brightener 206; OB 206; 2,2'-(Vinylenedi-p-phenylene)bisbenzoxazole-5,5'-disulfonic acid disodium salt
EINECS	235-756-1

Quality Control

Every batch of Fluorescent Brightener 206 is produced under a strict quality management system. We conduct rigorous in-process and final product testing to ensure consistent performance, including purity, hue, and solubility. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee it meets your specific application 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). Keep away from heat sources and incompatible materials. Under these conditions, the product remains stable for an extended period.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Moisture Content	≤ 5.0%
Ash Content	≤ 0.5%
pH (1% Solution)	7.0 - 9.0
Whiteness Degree	≥ 150 (Standard Fabric)

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