Description

Triphenylsulfonium salicylate (CAS No. 345580-99-6) is a high-purity sulfonium salt with the molecular formula C₂₅H₂₀O₃S. This compound, also known by its IUPAC name 2-carboxyphenolate;triphenylsulfanium, is a versatile reagent widely used in photopolymerization, catalysis, and advanced material synthesis. Its unique structure combines a triphenylsulfonium cation with a salicylate anion, offering excellent solubility in organic solvents and thermal stability up to 200°C. Triphenylsulfonium salicylate is particularly valued in photoresist formulations for semiconductor manufacturing due to its efficient photoacid generation (PAG) properties. Available in 98%+ purity, this product is supplied as a white to off-white crystalline powder with strict quality control to ensure batch-to-batch consistency for research and industrial applications.

Properties

• CAS Number: 345580-99-6
• Complexity: 334
• IUPAC Name: 2-carboxyphenolate;triphenylsulfonium
• InChI: InChI=1S/C18H15S.C7H6O3/c1-4-10-16(11-5-1)19(17-12-6-2-7-13-17)18-14-8-3-9-15-18;8-6-4-2-1-3-5(6)7(9)10/h1-15H;1-4,8H,(H,9,10)/q+1;/p-1
• InChI Key: KKLIEUWPBXKNFS-UHFFFAOYSA-M
• Exact Mass: 400.11331567
• Molecular Formula: C25H20O3S
• Molecular Weight: 400.5
• SMILES: C1=CC=C(C=C1)[S+](C2=CC=CC=C2)C3=CC=CC=C3.C1=CC=C(C(=C1)C(=O)O)[O-]
• Topological: 61.4
• Monoisotopic Mass: 400.11331567
• Synonyms: 345580-99-6, triphenylsulfonium salicylate, 962-446-0, Triphenylsulfonium 2-hydroxybenzoate, SCHEMBL109218, KKLIEUWPBXKNFS-UHFFFAOYSA-M, DB-388642, H27529

Application

Triphenylsulfonium salicylate is primarily used as a photoacid generator (PAG) in chemically amplified photoresists for deep UV and electron beam lithography in semiconductor fabrication. It also serves as a catalyst in cationic polymerization reactions for epoxy resins and other thermosetting polymers. Researchers utilize this compound in the development of advanced polymeric materials and as a precursor for sulfonium-based ionic liquids.

Safety and Hazards

GHS Hazard Statements

• H301 (88.9%): Toxic if swallowed [Danger Acute toxicity, oral]
• H315 (11.1%): Causes skin irritation [Warning Skin corrosion/irritation]
• H319 (11.1%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]

Precautionary Statements

• P264, P264+P265, P270, P280, P301+P316, P302+P352, P305+P351+P338, P321, P330, P332+P317, P337+P317, P362+P364, P405, and P501

Hazard Classes and Categories

• Acute Tox. 3 (88.9%)
• Skin Irrit. 2 (11.1%)
• Eye Irrit. 2 (11.1%)

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