(4-Methylphenyl)diphenylsulfonium triflate
(4-Methylphenyl)diphenylsulfonium triflate (CAS: 81416-37-7, Formula: C20H17F3O3S2) is a specialized organic compound with a molecular weight of 426.47 g/mol. As a photoacid generator and cationic photoinitiator, it plays a crucial role in photopolymerization processes. Its ability to generate strong acids upon UV irradiation makes it highly valuable in advanced materials science and microelectronics applications, including photoresist formulations.
- IUPAC
- (4-Methylphenyl)diphenylsulfonium trifluoromethanesulfonate

Cationic Photoinitiator
(4-Methylphenyl)diphenylsulfonium triflate serves as an effective cationic photoinitiator. Upon exposure to UV light, it generates cations that initiate the polymerization of various monomers, particularly epoxides and vinyl ethers.
Photoacid Generator (PAG)
This compound functions as a photoacid generator, releasing a strong acid upon UV irradiation. This property is extensively utilised in photolithography and the formulation of photoresists for microelectronic fabrication.
Materials Science
In materials science, it is employed in the development of UV-curable resins and coatings. Its photochemical properties enable precise control over polymerization, facilitating the creation of advanced materials with tailored characteristics.
Micro/Nanoelectronics
Its application extends to micro- and nanoelectronics, where it is integral to the photolithographic processes used in semiconductor manufacturing and the creation of microdevices.
| Molecular weight | 426.47 |
|---|---|
| Empirical formula | C20H17F3O3S2 |
| Application | Cationic photoinitiator. Photoacid generator. |
| Melting point | 98-102 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 237 nm |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is (4-Methylphenyl)diphenylsulfonium triflate used for?
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(4-Methylphenyl)diphenylsulfonium triflate is primarily used as a cationic photoinitiator and a photoacid generator. It is essential in UV-curing applications, photolithography, and the formulation of photoresists for microelectronics and advanced materials development.
What are the CAS number and formula for (4-Methylphenyl)diphenylsulfonium triflate?
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The CAS number for (4-Methylphenyl)diphenylsulfonium triflate is 81416-37-7, and its empirical formula is C20H17F3O3S2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical for research and development purposes. The specific grade and purity are available upon request and detailed on the product's Certificate of Analysis. We do not represent this product as meeting USP, BP, or EP pharmacopoeial standards.
What are the safety and handling precautions for this chemical?
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This compound is classified as a Warning. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask (type N95 or equivalent), eyeshields, and gloves, should be worn. Handle in a well-ventilated area and avoid breathing dust.
How is (4-Methylphenyl)diphenylsulfonium triflate packed, shipped, and exported?
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Tech Serve Solutions carefully packs and prepares (4-Methylphenyl)diphenylsulfonium triflate for safe domestic and international shipment. We adhere to all relevant regulations for the export of chemical products.
How can I request a sample or a quote?
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To request a sample or obtain a quotation for (4-Methylphenyl)diphenylsulfonium triflate, please contact our sales department through the TSS website or by phone. Our team will be pleased to assist you with your inquiry.
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