Diphenyl Sulfone
Industrial-grade Diphenyl Sulfone (CAS 127-63-9) supplied wholesale by Zyntex. Thermally stable sulfone used as high-temperature solvent for PEEK production, thermal paper sensitizer and chemical intermediate. CoA and SDS.
Description
Diphenyl Sulfone Product Overview
Diphenyl sulfone (C12H10O2S) is a white crystalline solid that melts at about 123–129°C and boils at about 379°C. It is chemically very stable and dissolves many aromatic compounds when molten.
High-performance polymer producers use molten diphenyl sulfone as the reaction solvent for polyether ether ketone (PEEK) and related polyaryletherketones, which require temperatures above 300°C. In thermal paper, it acts as a sensitizer that lowers the melting point of the color-forming layer, often used with developers such as 2.4 – Dihydroxydiphenyl sulfone.
It also serves as an intermediate for sulfone-based compounds and as a plasticizer and high-temperature heat transfer medium. For a related aliphatic sulfone, see Dimethylsulfone.
Key Applications of Diphenyl Sulfone
Main application areas:
🏭 PEEK Production
High-temperature solvent for polyaryletherketone synthesis.
🧾 Thermal Paper
Sensitizer in thermal paper coatings.
🧪 Chemical Intermediate
Starting material for sulfone compounds.
🔥 Heat Transfer
High-boiling medium for specialty processes.
Diphenyl Sulfone Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Diphenyl sulfone |
| CAS Number | 127-63-9 |
| EC Number | 204-853-1 |
| Molecular Formula / Weight | C12H10O2S / 218.27 g/mol |
| Grade | Industrial / Technical Grade |
| Melting Point | 123°C – 129°C |
| Category | Sulfones & Sensitizers |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: Low acute hazard, but dust may irritate the eyes and respiratory tract, and hot molten material causes burns. Avoid dust formation and wear gloves and eye protection. Store in tightly closed containers in a cool, dry place. Always consult the Safety Data Sheet (SDS) for full classification and handling instructions.
Frequently Asked Questions
Why is it used to make PEEK?
PEEK must be polymerized above 300°C. Molten diphenyl sulfone stays stable and keeps the reactants and growing polymer in solution at these temperatures.
What does it do in thermal paper?
As a sensitizer, it lowers the melting temperature of the coating so the color reaction starts at the right printhead temperature.
How can I get a price and documents?
Prices depend on quantity, packaging and destination. Contact us with your required volume to receive a quotation together with the CoA and SDS.
