Description

Sulfonium, Tris(4-Hydroxyphenyl)-, Chloride is a specialized organosulfur compound featuring a central sulfonium cation with three phenolic substituents. This unique structure makes it a valuable intermediate and functional material in advanced chemical synthesis and materials science. It is primarily sought by research and development teams, as well as production chemists, in the pharmaceutical, agrochemical, and specialty polymer industries for applications requiring precise molecular architecture.

Application

• As a key photoacid generator (PAG) precursor in the formulation of advanced photoresists for semiconductor and microelectronics manufacturing.
• An essential building block in organic synthesis for creating novel sulfonium-based catalysts and ionic liquids.
• Utilized in the research and development of functional polymers and epoxy curing agents with enhanced thermal or mechanical properties.
• As a chemical intermediate in pharmaceutical research for the synthesis of potential drug candidates and bioactive molecules.
• Investigated for use in analytical chemistry as a derivatization agent or a standard for method development.
• Potential application in the synthesis of specialty surfactants or phase-transfer catalysts due to its ionic nature.

Basic Information

Product Name	Sulfonium, Tris(4-Hydroxyphenyl)-, Chloride
CAS No.	17755-35-0
Molecular Formula	C18H15ClO3S
Molecular Weight	346.83 g/mol
Synonyms	Tris(4-hydroxyphenyl)sulfonium chloride; Tris(p-hydroxyphenyl)sulfonium chloride; (4-Hydroxyphenyl)diphenylsulfonium chloride (isomer); THPS-Cl; Triphenylsulfonium chloride derivative; Sulfonium, triphenyl-, chloride, hydroxy deriv.; Photoacid generator intermediate; PAG precursor
EINECS	Contact for details

Quality Control

Our Sulfonium, Tris(4-Hydroxyphenyl)-, Chloride is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via FT-IR and NMR spectroscopy, to ensure it meets exacting research and industrial-grade standards. A detailed Certificate of Analysis (COA) documenting purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and consistency.

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 (moisture-sensitive) nature, the container must be kept sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Assay	≥ 98.0% (on dried basis)
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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