Optical Brightener KSN for Plastics | C.I. Fluorescent Brightener 368 | CAS No. 5242-49-9

Short Description:

Optical Brightener KSN (C.I. Fluorescent Brightener 368, CAS No. 5242‑49‑9) is a yellowish‑green crystalline‑powder fluorescent whitening agent for a wide range of plastics and polymers.
It offsets undesirable yellow tones and boosts the perceived whiteness, brightness and visual look of finished plastic articles. KSN fits engineering‑plastic and polymer systems that demand optical whitening under high‑temperature processing.

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Product Detail

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Key Features

Excellent Optical Brightening Performance

Optical Brightener KSN provides effective fluorescent whitening performance, helping reduce the visual impact of yellowish tones and improve the brightness and appearance of finished plastic products.

Suitable for Engineering Plastics

KSN is suitable for compatible engineering plastic systems, including ABS, PA, PBT and PET applications.

Suitable for PVC & EVA

Optical Brightener KSN can be used in compatible PVC and EVA formulations where enhanced whiteness and brightness are required.

Good High-Temperature Performance

KSN is suitable for polymer processing systems involving elevated processing temperatures, making it particularly useful for compatible engineering plastic applications. Public technical data also describes KSN as having good thermal resistance and suitability for PET, PBT, PA and ABS.

Broad Polymer Compatibility

KSN can be incorporated into a variety of compatible plastic and polymer systems according to resin type, processing conditions and required optical performance.

Product Information

Item	Information
Product Name	Optical Brightener KSN
C.I. Name	C.I. Fluorescent Brightener 368
CAS No.	5242-49-9
Molecular Formula	C29H20N2O2
Molecular Weight	428.48
Appearance	Yellowish-green crystalline powder
Main Applications	PVC, ABS, EVA, TPE/TPA, PA, PBT, PET and other compatible polymer systems

Typical Applications

PVC

Optical Brightener KSN can be used in compatible PVC formulations to improve perceived whiteness, brightness and finished-product appearance.

ABS

KSN is suitable for compatible ABS applications requiring improved optical brightness and color appearance.

EVA

Optical Brightener KSN can be incorporated into compatible EVA systems to enhance whiteness and visual brightness.

PA (Polyamide)

KSN is suitable for compatible polyamide applications, particularly where optical brightening performance under elevated processing temperatures is required.