Description

Diphenyl(4-tert-Butylphenyl)Sulfonium Bromide is a high-purity, specialized sulfonium salt widely used as a key photoacid generator (PAG) in advanced photoresist formulations. Its primary value lies in its excellent photosensitivity and thermal stability, which are critical for producing precise and high-resolution micro-patterns. This compound is essential for manufacturers and R&D facilities in the semiconductor, electronics, and advanced materials sectors seeking reliable performance in photolithography and cationic polymerization processes.

Application

• Semiconductor Photolithography: A critical photoacid generator (PAG) in chemically amplified photoresists for deep-UV (DUV) and other advanced lithography processes.
• Advanced Electronics Manufacturing: Used in the production of printed circuit boards (PCBs), flat panel displays, and micro-electromechanical systems (MEMS).
• Polymer Science & Curing: Initiates cationic polymerization for coatings, adhesives, and specialty polymers requiring precise curing control.
• UV-Curable Inks and Coatings: Serves as an efficient photoinitiator in formulations for industrial and graphic arts applications.
• Academic & Industrial R&D: A valuable reagent for developing new photoresist materials and studying reaction mechanisms in photochemistry.
• Optical Material Fabrication: Employed in the creation of waveguides, optical fibers, and other light-sensitive components.

Basic Information

Product Name	Diphenyl(4-tert-Butylphenyl)Sulfonium Bromide
CAS No.	258872-06-9
Molecular Formula	C22H23BrS
Molecular Weight	399.39 g/mol
Synonyms	(4-tert-Butylphenyl)diphenylsulfonium Bromide; Diphenyl(4-tert-butylphenyl)sulfanium Bromide; Sulfonium, diphenyl(4-(1,1-dimethylethyl)phenyl)-, bromide; Photoacid Generator PAG; Sulfonium Salt Photoinitiator; tert-Butyldiphenylsulfonium Bromide (variation); (p-tert-Butylphenyl)diphenylsulfonium Bromide
EINECS	Contact for details

Quality Control

Our Diphenyl(4-tert-Butylphenyl)Sulfonium Bromide is manufactured under strict quality management protocols to ensure batch-to-batch consistency and high purity, meeting the stringent requirements of the electronics and photopolymer industries. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles. We adhere to relevant quality standards and can support customer audits and regulatory documentation as needed.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Heavy Metals	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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