your best partner for vacuum

EV-Silicon Oil-705

For diffusion pumps
EV-Silicon Oil-705 is a genuine Pentaphenyl Trisiloxane product that has excellent pressure characteristics, and is ideal for ultra high vacuum applications where extremely low rates of back streaming are required. Dow Corning DC705 users will recognise this product as being a genuine

replacement for the now unobtainable DC705 product. Users can expect to see the same performance curves as DC705.

EV-Silicon Oil-705 is a complete drop in replacement for Dow Corning DC705 or Wacker AN 175.


EV-Silicon Oil-705 is available in:

1 kilo – article number: 100800
5 kilo – article number: 100802
20 kilo – article number: 100803

For larger quantities please consult Eurovacuum BV or one of our dealers.

Technical data

Saturated Vapour Pressure @ 25ºC: 3.0 X 10-10 torr
Average Boiling Range @ 5.0 X 10-1: N/A
Mid Range Boiling @ 5.0 X 10-1: N/A
Initial Boiling Point @ 5.0 X 10-1 torr = 245ºC: <0.1gr: = 0.025% Wt.
Molecular Weight: 546g/mol
Flash Point: >245ºC
Viscosity @ 40ºC: 85cst
Viscosity @ 25ºC: 175cst
Specific Gravity @ 25ºC: 1.09
Colour: Water white
Oil Type: Phenyl-methyl