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Silicone Diffusion Pump Oil MY705

    Silicone Diffusion Pump Oil MY705


    1. 1,1,3,5,5-Pentaphenyl-1,3,5-trimethylsiloxane

    2. 705 Super high vacuum diffusion pump oil

    3. 705 Diffusion Pump Fluid

    4. PhenylmethylsiloxaneOligomers

    5. Oil for diffusion pump

    CAS No.: 3390-61-2

    Chemical structure:

    Diffusion Pump Oil MY705 is a colorless transparent oily liquid, single-component fluid designed for ultrahigh vacuum applications in the range of 5x(10-9~10-10) torr (untrapped). The vapor pressure and the best resistance to radiation.

    Technical Index:

    Chemical composition: Pentaphenyl trimethyl trisiloxane

    Ultimate Vacuum, torr(untrapped): 5x(10-9~10-10)

    Saturated Vapor Pressure, torr: 5x10-10

    Specific Gravity: 1.090 ~ 1.100

    Viscosity (25°C), cSt: 170~175

    Viscosity (40°C), cSt: 61~64

    Flash Point °C: ≥243

    Refractive Index 25°C: 1.5765-1.5785

    Congealing Point °C: ≤-14 ~ -18

    Molecular Description: 546


    Diffusion Pump Fluid MY705 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-film deposition.

    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 and various instruments.

    Package, Transportation & Storage:

    1. Diffusion Pump Oil MY705 is available in 1kg plastic bottles, 1 gallon plastic drums, 5kg plastic drums,25kg plastic drums, 25kg Iron drums or 200kg Iron drums or IBC drums.

    2. Transport as non-hazardous chemicals, keeping away from rain and sunlight.

    3. Shelf life: 3 years.

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