Description

Fluorescent Brightener 140 is a high-performance stilbene derivative optical brightening agent (OBA) designed to impart a brilliant white appearance to various substrates. Its core value lies in its exceptional whitening and brightening efficiency, which enhances the perceived quality and visual appeal of finished products. This agent is essential for manufacturers in the plastics, synthetic fibers, and detergent industries seeking to achieve superior optical properties and meet stringent color standards.

Application

• Plastics and Polymers: Widely used as a whitening agent for polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), and polystyrene (PS) to correct yellowness and improve brightness.
• Synthetic Fibers: Effective in the spin-finish and masterbatch formulation for polyester, nylon, and acrylic fibers to produce brilliantly white textiles.
• Detergent and Soap Industry: Incorporated into laundry detergents, fabric softeners, and soaps to provide a whitening effect on fabrics during washing.
• Paper and Pulp: Used in coating formulations and pulp treatment to enhance the whiteness and brightness of high-quality paper products.
• Coatings and Inks: Applied in specific coating systems and printing inks where optical brightening is required for premium visual effects.

Basic Information

Product Name	Fluorescent Brightener 140
CAS No.	61968-71-6
Molecular Formula	C₄₀H₄₂N₁₂O₆S₂
Molecular Weight	843.0 g/mol
Synonyms	Fluorescent Brightener OB-1; 2,2'-(1,2-Ethenediyl)bis[5-[4-(4-morpholinyl)-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid disodium salt; Tinopal OB; Blankophor OB; 4,4'-Bis(2-sulfostyryl)biphenyl disodium salt (related structural class); Optical Brightener 140; FBA 140; OB-1
EINECS	Contact for details

Quality Control

Our Fluorescent Brightener 140 is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, performance, and compliance with industry specifications. A comprehensive Certificate of Analysis (COA), detailing parameters such as assay, hue, and strength, is provided to guarantee supply reliability and product consistency for your critical processes.

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 incompatible materials and direct heat sources.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Hue	Standard sample
Strength	100 ± 3%
Moisture Content	≤ 1.0%
Ash Content	≤ 0.5%
Solubility (in DMF)	Clear solution

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