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Purity: 98%;
Commercialized mature products
| Product Name | Bis(4-tert-butylphenyl)iodonium chloride |
| Synonyms | Bis(4-tert-butylphenyl)iodoniumchloride;NSC8994;Bis(tert-butylphenyl)IodoniumChloride;4,4′-Di-tert-butyldiphenyliodoniumchloride;Iodonium,bis[4-(1,1-dimethylethyl)pheny]-,chloride(PF);4,4′-Di-tert-(t-butylphenyl)IodoniumChloride;Iodonium,bis[4-(1,1-dimethylethyl)phenyl]-,chloride;InitiatorIntermediateI |
| CAS NO | 5421-53-4 |
| Purity | 98% above |
| MF | C20H26ClI |
| MW | 428.77791 |
| Contact | selina@coreychem.com |
Chemical name: Bis(4-tert-butylphenyl)iodonium chloride
Molecular formula: C₂₀H₂₆ClI
Molecular weight: 428.78
Appearance: White to light yellow crystalline powder
Chemical type: Diaryliodonium salt (onium compound)
Photochemical property: Easily decomposes under UV or visible light to generate reactive cations or radicals.
This is the most common and important application.
Bis(4-tert-butylphenyl)iodonium chloride undergoes photolysis under UV or visible light to produce aryl radicals (Ar•) and strong acids (H⁺ or Lewis acids), which initiate cationic polymerization of epoxy resins, vinyl ethers, urethane monomers, and other systems.
Reaction scheme:
Ar2I+→hνAr•+ArI+H+Ar_2I^+ \xrightarrow{h\nu} Ar^• + ArI + H^+
Key features in UV-curable systems:
Fast polymerization rate
Low shrinkage during curing
Excellent transparency and bubble-free films
Less sensitive to humidity
Acts as a source of strong acids upon exposure to light, enabling image formation or etching processes.
Widely used in:
Photoresists for microelectronics
Semiconductor lithography
Printed circuit boards (PCB)
Microfabrication and MEMS
When combined with electron donors such as amines, thioethers, or acetone derivatives, it can form hybrid radical/cationic initiation systems.
This combination enhances curing efficiency and expands the absorption range, making it suitable for visible-light LED curing systems (365–405 nm).
| Application Field | Function / Use |
|---|---|
| UV-curable epoxy systems | Initiates cationic polymerization of epoxy or vinyl ether monomers |
| Photoresists & electronic encapsulation | Acts as a photoacid generator (PAG) |
| UV-curable inks and coatings | Enables fast curing, high gloss, and excellent chemical resistance |
| 3D printing resins (SLA/DLP) | Improves accuracy, curing speed, and layer resolution |
| UV adhesives and optical resins | Used for low-shrinkage, transparent bonding formulations |
| Security & anti-counterfeit inks | Enhances photosensitivity and printing precision |
Light-sensitive: store in a sealed, light-protected container.
Keep in a cool, dry, and ventilated area.
Avoid inhalation of powder; use gloves and eye protection during handling.
Bis(4-tert-butylphenyl)iodonium chloride is a high-efficiency cationic photoinitiator and photoacid generator (PAG).
It decomposes under UV or visible light to produce strong acids and active species that initiate polymerization or pattern formation.
It is widely used in UV-curable epoxy systems, photoresists, electronic encapsulation materials, 3D printing resins, and high-performance UV inks and coatings.
1KG per bag; Or package according to customer needs
