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Optical Brightener KSN

Optical brightener KSN is a benzoxazole compound, and its appearance is a yellow crystalline powder with a melting point of 271℃, insoluble in water, odorless, and stable in performance. Optical brightener KSN is often used in high grade plastics that require extremely high whiteness.

Product Cate:Optical Brightening Agent For Plastic

Product Name:Optical Brightening Agent KSN

Chemical Name:4.4-bis(5-methyl-2-benzoxoazol)-ethylene

CAS No.:5242-49-9

C.I. No. :368

Molecular Formula:C30H22N2O2 


1. being highly whiteness with small usage. 

2. multipurpose used for whitening of polyester fiber and plastic. 

3. having a good compatibility and good fastness to light and sublimation. Can be used for high temperature process.

Treating Process Overlay plastic:0.5-2g/100kg 

Polyester fiber:10-20g

Package 20kg cardboard drum

Technical Index Appearance: greenish yellow powder 

Melting process: 300~320°C 

Ash content:≤0.5% 


Volatile content:≤0.5% 

Fineness(300 mesh):100% 


mainly be used in whitening of polyester, polyamide, polyacrylonitrile fiber, the plastic film and all plastic pressing process. Can suitable for synthesizing high polymer including polymeric process.

The Rubber Optical Brightener KSN is mainly used for outdoor rubber, with good weather resistance and excellent stability.In some countries,the customers also called it Optical Brightener KS.
China and India are the two big production bases in the world,China has the full optical brighteners products series,and India has some water solved optical brighteners.