Sinocure Chemical Group Co.,Ltd.

Sinophor® Fluorescent Brightener

Sinophor® KSN

Sinophor® KSN,which has good whitening effect, blue-violet shade, excellent light resistance, suitable for all plastics, especially high-end plastics and synthetic fibers that require high whiteness. It has a strong whitening effect. At the same time, it can also be used for whitening and brightening color materials in coatings, paints, inks and other industries.

Sinophor® KSN has the following characteristics:
1. Small dosage, high whitening strength, a small amount can bring very good whitening effect.
2. Wide application performance, widely used in the whitening of polyester and other chemical fibers and various plastics.
3. It has good compatibility with plastics, high temperature resistance and excellent light and weather resistance.

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SKU SCGFB004 Category


Chemical Name:4-(Benzoxazol-2-yl)-4′-(5-methylbenzoxazol-2-yl)stilbene

Synonym:Fluorescent Brightener 368;OPTICAL BRIGHTENER 368;Fluorescent Brightener KSN;FBA 368

Cas No.: 5242-49-9



Appearance Light yellow green powder
Assay ≥99%
Melting point 250-300℃
Density 1.261g/cm3
Ash content ≤0.5%
Shade  blue-violet light
Fineness ≥100 mesh
Solubility insoluble in water, soluble in high-boiling organic solvents such as trichlorobenzene.

Features and uses:

1. It is suitable for whitening polyester, polyamide, polyacrylonitrile and other fibers, silk fabrics and wool fabrics.
2. Widely used in film, injection molding and extrusion molding materials, suitable for all plastic processing.
3. It is very suitable for whitening at any processing stage of synthetic polymers, including the polymerization stage.

Reference dosage
The general whitening reference dosage for plastic substrates is 0.002-0.03%, that is, the amount of fluorescent whitening agent KSN added is about 10-30 grams per 100 kg of plastic raw materials.
The reference dosage of brightener in transparent plastics is 0.0005 to 0.002%, that is, 0.5-2 grams per 100 kilograms of plastic raw materials.
The reference dosage of brightener in polyester resin (polyester fiber) is 0.01-0.02%, that is, about 10-20 grams per 100 kilograms of resin.


Storage:Stored in a cool dry place out of direct sunlight.


Chemical Name

Fluorescent Brightener KS-N

Cas No.









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