Triphenylsulfonium bromide

Name: Triphenylsulfonium bromide
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CAS No. 3353-89-7
Cat. No. CS-0368288
Purity≥98%
MDL No.MFCD00428762

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Type	HazMat Fee
Excepted Quantity	$0.00
FedEx Limited Quantities Ground	$0.00
Hazmat Ground shipping	$50.00+
Inaccessible (Haz class 6.1 or 9), Domestic	$68.00+
Accessible (Haz class 3, 4, 5 or 8), Domestic	$158.00+
Inaccessible (Haz class 6.1 or 9), International	$108.00+
Accessible (Haz class 3, 4, 5 or 8), International	$238.00+

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General Information

CAS No. 3353-89-7
Cat. No. CS-0368288
Purity ≥98%
MDL No. MFCD00428762
Storage 4°C, sealed storage, away from moisture
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₁₈H₁₅BrS
Molecular Weight 343.28
Synonym(s) Triphenylsulfonium Bromid
SMILES C1=CC=C(C=C1)[S+](C2=CC=CC=C2)C3=CC=CC=C3.[Br-]

Description

Triphenylsulfonium bromide serves as a potent photoinitiator in UV-curable systems, delivering rapid cationic polymerization upon irradiation. The trityl sulfonium core generates strong acid under exposure, enabling efficient activation of epoxy and vinyl ether monomers. This bench-stable, moisture-tolerant salt integrates seamlessly into coating and resist formulations requiring high sensitivity and low outgassing.

Application

Triphenylsulfonium bromide serves as a robust source of sulfonium cations, enabling efficient photochemical and thermal desulfurization reactions in synthetic organic chemistry. It functions as a key reagent in the formation of carbocations and radical intermediates, particularly in photoinitiated polymerizations and C–H functionalization processes. The compound exhibits excellent bench stability, ease of handling, and compatibility with diverse functional groups, making it a practical choice for constructing complex molecular architectures and heterocyclic scaffolds in industrial R&D workflows.

Safety Information

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GHS Pictogram :	GHS No : GHS07
Signal Word : Warning	UN#: N/A
Class : N/A	Packing Group : N/A
Hazard Statements : H315-H319
Precautionary Statements : P264-P280-P302+P352-P362+P364

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Computational Chemistry Data

TPSA 0
LogP 1.786
H_Acceptors 0
H_Donors 0
Rotatable_Bonds 3

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Triphenylsulfonium bromide

CAS No. 3353-89-7

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