Description

Fluorescent Brightening Agent 258 (CAS NO 82446-26-2) is a high-performance stilbene derivative optical brightener engineered to impart a brilliant white appearance to substrates by absorbing ultraviolet light and re-emitting it as visible blue light. This compound is critical for manufacturers seeking to enhance the perceived brightness, whiteness, and overall aesthetic quality of their products. It is an essential additive for industries where visual appeal and color correction are paramount to product value and market competitiveness.

Application

• Paper Manufacturing: Widely used in the production of high-brightness printing, writing, and specialty papers to achieve superior whiteness and opacity.
• Detergent & Laundry Care: Incorporated into laundry detergents, fabric softeners, and soaps to counteract yellowing and make white fabrics appear brighter and cleaner.
• Textile & Fiber Treatment: Applied in the finishing of cotton, nylon, and other synthetic fibers to improve whiteness and brightness, especially for white textiles.
• Plastics and Polymers: Used as a masterbatch additive for engineering plastics, PVC, and polyolefins to correct inherent yellowness and enhance visual appeal.
• Cosmetics and Personal Care: Employed in formulations such as shampoos, conditioners, and skin creams where a bright, clean appearance is desired.
• Coatings and Paints: Added to white paints, varnishes, and coatings to improve initial whiteness and reduce yellowing over time.

Basic Information

Item	Detail
Product Name	Fluorescent Brightening Agent 258
CAS No.	82446-26-2
Molecular Formula	C₄₀H₄₂N₁₂O₆S₄
Molecular Weight	907.10 g/mol
Synonyms	Tinopal CBS-X; Fluorescent Brightener 258; 2,2'-(1,2-Ethenediyl)bis[5-[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid disodium salt; FBA 258; Optical Brightener 258; Blankophor BSU; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]-, disodium salt; Whitex B
EINECS	Contact for details

Quality Control

Our Fluorescent Brightening Agent 258 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent purity, performance, and compliance with industry specifications. A Certificate of Analysis (COA) detailing key parameters such as assay, hue, and solubility is provided with each shipment to guarantee traceability and product integrity.

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. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product efficacy.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Moisture Content	≤ 2.0%
Ash Content	≤ 0.5%
pH (1% Solution)	7.0 - 9.0
Whiteness Degree	Standard sample ± 3
Solubility in Water	Clear solution

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