Silico® PF8705 Silicone Diffusion Pump Fluid
Silico® PF8705 Silicone Diffusion Pump Fluid is a single-component fluid for ultrahigh vacuum applications, equivalent to Dow DC-705 and Shin-Etsu HIVACF-5. It has the highest phenyl content and superior radiation resistance among silicone diffusion pump fluids, making it ideal for advanced vacuum systems.
Product Introduction:
Technical Specifications:
| Property | Value |
|---|---|
| CAS No. | 3982-82-9 |
| EINECS No. | 223-620-5 |
| Formula | C30H32O2Si3 |
| Molecular Weight | 508.88 |
| Chemical Name | Tetraphenyltrimethyldisiloxane |
| Color and Appearance | Colorless to light straw-colored fluid |
| Ultimate Vacuum (untrapped) | 10-9 to 10-10 torr |
| Ultimate Vacuum (trapped) | 10-11 torr |
| Extrapolated Vapor Pressure | 2 x 10-8 torr at 25°C |
| Specific Gravity at 25°C | 1.08 |
| Refractive Index at 25°C | 1.560 – 1.570 |
| Viscosity at 25°C | 40 – 50 cSt |
| Flash Point (Open Cup) | 230°C |
| Boiling Point at 0.5 torr | 220°C |
| Typical Boiler Temperature | 225°C |
| Surface Tension | 38.0 dynes/cm |
| Heat of Vaporization | 28.5/260°C kcal/g mol |
Applications
Silico® PF8705 is suitable for high-performance ultrahigh vacuum applications, including:
Mass Spectrometry
Electron Microscopy
Space Simulation Chambers
Advanced Semiconductor Manufacturing
High-Energy Physics Research
Packaging and Storage
Packaging: 1Kg bottles, 5Kg, 25Kg pails, and 200Kg steel drums.
Shelf Life: 60 months when stored in original unopened packaging.
All technical data provided is based on current knowledge and experience. Users must test product suitability for intended applications.
No warranties are expressed or implied. Silico® assumes no liability for incidental or consequential damages.
Jessica G.
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