Description

Bis-(4-tert-Butylphenyl)-Iodonium Hexafluoroantimonate is a highly reactive photoacid generator (PAG) and cationic polymerization initiator essential for advanced manufacturing processes. Its core value lies in its ability to generate strong Brønsted acids upon exposure to UV light or heat, facilitating rapid and controlled cross-linking reactions. This compound is critically needed by formulators and manufacturers in the electronics, coatings, and advanced materials sectors for producing high-performance photoresists, UV-curable inks, and specialty polymers.

Application

• Photoresist Formulation: A key component in chemical amplification resists (CARs) for semiconductor and microelectronics lithography, enabling sub-micron patterning.
• UV-Curable Coatings & Inks: Serves as a highly efficient cationic photoinitiator for epoxy and vinyl ether-based systems used in industrial coatings, printing inks, and adhesives.
• Fiber Optics & Optical Materials: Used in the production of specialized optical fibers and coatings where precise, acid-catalyzed curing is required.
• Advanced Composite Materials: Facilitates the cationic curing of matrices in high-performance composites for aerospace and automotive applications.
• 3D Printing (Stereolithography): Enables rapid prototyping and production of high-resolution parts via vat photopolymerization techniques.
• Acid-Catalyzed Organic Synthesis: Employed as a stable, soluble source of superacid for specialized laboratory and pilot-scale synthetic chemistry.

Basic Information

Product Name	Bis-(4-tert-Butylphenyl)-Iodonium Hexafluoroantimonate
CAS No.	61358-23-4
Molecular Formula	C20H26F6ISb
Molecular Weight	654.08 g/mol
Synonyms	Bis(4-tert-butylphenyl)iodonium hexafluoroantimonate; 4-tert-Butylphenyl iodonium hexafluoroantimonate; Iodonium, bis(4-(1,1-dimethylethyl)phenyl)-, hexafluoroantimonate(1-); (4-tert-Butylphenyl)iodonium hexafluoroantimonate; Photoacid Generator 250; PAG 250; Iodonium Salt PI-BPI; Bis(p-tert-butylphenyl)iodonium hexafluoroantimonate
EINECS	Contact for details

Quality Control

Our Bis-(4-tert-Butylphenyl)-Iodonium Hexafluoroantimonate is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity for sensitive applications like photolithography. Each lot undergoes rigorous analytical testing, including HPLC for assay and purity, NMR for structural confirmation, and ICP-MS for trace metal analysis. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed and under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent decomposition. Keep away from incompatible materials such as strong bases and reducing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	145 - 155 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Chloride (Cl)	≤ 50 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.