Diphenyl sulfone
Diphenyl sulfone (CAS: 127-63-9) is a stable, high-boiling organic compound with the linear formula (C6H5)2SO2 and a molecular weight of 218.27 g/mol. It serves as a versatile building block in organic synthesis and chemical manufacturing. This sulfone is recognised for its thermal stability and is primarily employed as an intermediate in the production of polymers and other complex organic molecules.
- IUPAC
- Phenyl sulfone
- Synonyms
- Phenyl sulfone

Polymer Synthesis
Diphenyl sulfone is used as a monomer or co-monomer in the synthesis of high-performance polymers, such as polyethersulfones (PES) and polysulfones, valued for their thermal and mechanical properties.
Organic Synthesis Intermediate
It acts as a crucial intermediate in the production of various fine chemicals and pharmaceuticals. Its sulfone group can be further functionalised to create more complex molecular structures.
Plasticiser
In certain applications, diphenyl sulfone can function as a plasticiser, improving the flexibility and processability of polymers.
| Molecular weight | 218.27 |
|---|---|
| Linear formula | (C6H5)2SO2 |
| Boiling point | 379 °C(lit.) |
| Melting point | 123-129 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| 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.
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 Diphenyl sulfone primarily used for?
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Diphenyl sulfone is primarily used as a building block in organic synthesis, particularly in the production of high-performance polymers like polyethersulfones and as an intermediate for fine chemicals.
What are the CAS number and formula for Diphenyl sulfone?
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The CAS number for Diphenyl sulfone is 127-63-9, and its linear formula is (C6H5)2SO2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Diphenyl sulfone typically as a technical or research grade. We do not represent this product as USP, BP, or EP grade unless explicitly stated otherwise in the product specifications.
How should Diphenyl sulfone be handled safely?
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Diphenyl sulfone is harmful if swallowed, causes skin irritation, causes serious eye irritation, and may cause respiratory irritation. Handle with appropriate personal protective equipment in a well-ventilated area, avoiding dust formation and contact with skin, eyes, and clothing. Refer to the Safety Data Sheet (SDS) for detailed handling instructions.
Is Diphenyl sulfone a controlled substance?
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Based on the provided data, Diphenyl sulfone is not indicated as a controlled substance.
How is Diphenyl sulfone packed and shipped?
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Diphenyl sulfone is carefully packed according to industry standards to ensure safe transit and is exported globally by Tech Serve Solutions.
How can I request a quote or sample of Diphenyl sulfone?
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To request a quote or a sample of Diphenyl sulfone, please contact our sales department through the provided channels on our website.
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