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Silicone Diffusion Pump Oil Silibase-9704

Item No.: Silibase-9704

Product Name: Silicone Diffusion Pump Oil

Equivalent Brand: Diffusion Pump Oil Dow Corning 9704, HIVAC-F-4


1,1,5,5-Tetraphenyl-1,3,3,5-tetramethyltrisiloxane/9704silicone diffusion pump Fluid/9704 diffusion pump fluid/Oil for diffusion pumps

CAS No: 3982-82-9

Chemical structure:


Diffusion Pump Oil Silibase-9704 isa colorless transparent oily, single-component fluid designed for high vacuumof 10-7torr (untrapped). It performs well in tough, rugged applications andoffers quick pump down, even after exposure to air at operating temperatures. Silibase-9704 is thermally andchemically stable allowing it to keep pump jets free of tars and hard carbon.

Technical Index:

Chemical composition: Tetramethyl tetraphenyl trisiloxane

Ultimate Vacuum, torr(untrapped): 10-7~10-8

Saturated Vapor Pressure,torr : 5x10-8

Specific Gravity: 1.06 ~ 1.07

Viscosity (25℃), cSt: 38±3

Flash Point ℃: ≥210

Refractive Index 25℃: 1.5500~1.5600

Congealing Point ℃: -35

Molecular Description: 484


Diffusion Pump Fluid Silibase-9704 can be used in variety of applications, including:

Electrical and electronics industry

TV tubes, fluorescent tubes, cathode ray tubes

Ordinary bulbs


Rectifier metallised film vacuum system

Optical industry

Surface improvements

Anti reflective coatings

Optical filters and mirrors

Metallurgy industry

High-vacuum furnaces

Melting, degassing and sintering refractory metals; thick-filmdeposition

Plastics industry

Surface improvements

Mirror coatings

Protective coatings

Film coatings

Other industries

Processing metals and fuels


Molecular plants

R & D plants

Mass spectrometry


Be used as transmission fluid in high-temperature carriers andvarious instruments.

Package, Transportation & Storage

Diffusion Pump Oil Silibase-9704 isavailable in 1kg plastic bottles, 1gallon plastic drums,5kg plastic drums,25kgplastic drums, 25kg Iron drums or 200kg Iron drums.

Transport as non-hazardous chemicals, keeping away from rain andsunlight.

Shelf life: 3 years.

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