Cationic Photoinitiator 250/4-Isobutylphenyl-4'-methylphenyliodonium Hexafluorophosphate/CAS No.: 344562-80-7

Cationic Photoinitiator 250
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Cationic Photoinitiator 250

1. Product Identification

  • Product Name: Cationic Photoinitiator 250

  • Chemical Name: 4-Isobutylphenyl-4'-methylphenyliodonium Hexafluorophosphate

  • CAS No.:344562-80-7

  • Molecular Formula:C₁₇H₂₀F₆IP

  • Molecular Weight: 496.20 g/mol

2. Product Description

Cationic Photoinitiator 250 is a high-efficiency iodonium salt photoinitiator used for cationic UV curing systems. Upon UV irradiation, it generates strong Brønsted acids that initiate polymerization of epoxy resins, vinyl ethers, and other cationically curable materials. It provides fast curing speed, excellent surface curing, and good thermal stability.

3. Typical Properties

PropertyValue
AppearanceYellow to brown liquid
Purity≥ 99%
Density (25 °C)1.485 g/cm³
Volatile ContentMax. —
Flash Point—

Note: Values are typical and not intended as specifications.

4. Applications

  • UV-curable epoxy resins

  • Cationic UV coatings and inks

  • Adhesives and sealants

  • Electronic materials and encapsulation

  • Optical and protective coatings