CHLUMINIT® 550 / Photoinitiator 550 / Omnicat 550 CAS 591773-92-1

550 is a cationic photoinitiator with high photoinitiator activity, good surface drying, no yellowing, no migration, and no odor. It has a certain absorption at 365nm and can be used for LED curing.

Photoinitiator 550 Application scenarios

1. Canned Food Coatings
This is one of its typical applications. Cationic curing coatings offer excellent adhesion and chemical resistance, making them ideal for coating the inner and outer surfaces of food and beverage cans.

2. Coil Coatings
Used for pre-coating metal coils (such as color-coated steel sheets). They exhibit low shrinkage after curing and strong adhesion, suitable for high-speed coating production lines.

3. Pharmaceutical Packaging Coatings
Used on packaging materials like blister packs and bottle caps, requiring pure, low-odor coatings with excellent barrier properties and safety.

4. Printing Inks and Overprint Varnishes
Particularly suitable for colored systems (e.g., white inks) as it resists deactivation by pigment “shielding.” Also used in high-gloss, scratch-resistant topcoat varnishes.

5. Epoxy Resin Systems
Demonstrates high initiation activity in epoxy resin photopolymerization, enabling the production of high-performance composites or adhesives.

Description

CHLUMINIT® 550 / Photoinitiator 550 / Omnicat 550 CAS 591773-92-1

Synonym:  10-(4-Biphenylyl)-2-isopropyl-9-oxo-9H-thioxanthenium hexafluorophosphate

CAS No:  591773-92-1

Molecular Formula:  C28H23OS.PF6

General Information:

Photoinitiator 550 is a cationic photoinitiator with high photoinitiator activity, good surface drying, no yellowing, no migration, and no odor. It has a certain absorption at 365nm and can be used for LED curing.

Specification:

Appearance Yellow crystal powder
Purity ≥98%
Melting point 202-210℃
Volatile Matter ≤0.5%

Usage:

Cationic printing inks and overprint varnishes for special applications such as can coatings, coil coatings and pharmaceutical packaging.

Package:

1KG/BAG

Storage:

Store in a dry, clean, ventilated warehouse.
Avoid exposure to light and heat.
Be careful to prevent leakage, rain and sun during transportation.

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Additional information

Chemical Name

10-(4-Biphenylyl)-2-isopropyl-9-oxo-9H-thioxanthenium hexafluorophosphate

CAS No.

591773-92-1

Molecular Formula

C28H23OS.PF6

Assay

98%min

Package

1KG/BAG,20kgs/carton

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