Description

Fluorescent Whitening Agent Kcb CAS NO 63310-10-1 is a high-performance stilbene derivative belonging to the class of optical brighteners. It matters for its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, thereby enhancing the perceived whiteness and brightness of treated materials. This agent is essential for manufacturers in the textile, paper, and detergent industries seeking to improve the aesthetic appeal and market value of their products.

Application

• Primary brightening agent for synthetic fibers like polyester, nylon, and acetate.
• Enhancing the whiteness and brightness of paper pulp and finished paper products.
• Key ingredient in laundry detergents and fabric softeners for superior whitening effects.
• Used in the production of plastics and polymers to correct yellowness and improve visual quality.
• Application in coatings and paints to achieve high-gloss, bright white finishes.
• Potential use in advanced materials and security inks for optical effects.

Basic Information

Product Name	Fluorescent Whitening Agent Kcb
CAS No.	63310-10-1
Molecular Formula	C40H38N12Na2O8S2
Molecular Weight	924.9 g/mol
Synonyms	Tinopal CBS-X; Fluorescent Brightener 351; 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; 4,4'-Bis[[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonic acid disodium salt; FWA KCB; Optical Brightener KCB; Blankophor CBS-X
EINECS	Contact for details

Quality Control

Our Fluorescent Whitening Agent Kcb is manufactured under a stringent quality management system. Every batch undergoes rigorous testing for key parameters including purity, hue, and solubility to ensure consistent performance and compliance with industry standards. Certificates of Analysis (COA) detailing these 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Moisture Content	≤ 2.0%
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.