Nanjing SiSiB Silicones Co., Ltd.
Nanjing SiSiB Silicones Co., Ltd.
SiSiB® PF8704
SiSiB® PF8704

1,1,5,5-Tetraphenyl-1,3,3,5-tetramethyltrisiloxane

SiSiB® PF8704 Silicone Diffusion Pump Fluid is a single component fluid designed for high vacuum applications in the range of 10-6 to 10-8 torr (untrapped) and 10-10 to 10-11 torr (trapped).


Its low vapor pressure and thermal stability make it popular in processes such as vacuum coating, metallurgical work, and various other applications.


SiSiB® PF8704 phenyl methyl silicone oil is equal to DowCorning’s DC-704, Shin-Etsu’s HIVACF-4


SiSiB® PF8704

Technical Data


CAS No.

3982-82-9

EINECS No.

223-620-5

Formula

C28H32O2Si3

Molecular Weight

484.82

Chemical Name

Tetramethyltetraphenyltrisiloxane

Color and Appearance

Colorless to straw-colored fluid

Ultimate Vacuum, torr

10-7 to 10-8 untrapped


10-10 to 10-11 trapped

Extrapolated Vapor Pressure, torr, 25°C

2 x 10-8

Specific Gravity at 25°C

1.07

Refractive Index at 25°C

1.550~1.560

Viscosity at 25°C

36~44 cSt

Flash Point, open cup

221°C,

Boiling Point, 0.5 torr

215°C,

Typical Boiler Temperature

220°C,

Surface Tension, dynes/cm

37.3

Heat of Vaporization, kcal/g mol

25.5/250°C


Application


  • As for the use of silicone oil, SiSiB® PF8704 can be used in a variety of applications including: Aerospace, Electronics, Metallurgy, Vacuum Coatings, and Atomic Energy etc.


Packing and Storage



  • In the original unopened packaging, SiSiB® PF8704 has a shelf life of 60 months.


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SiSiB® PF8704