your best partner for vacuum

EV-Silicon Oil-740

For diffusion pumps
EV-Silicon Oil-740 (Phenyl-Methyl Silicone) is an excellent compromise oil having a mid-range boiling point approaching 704. Extensively used in heat treatment and investment casting applications where a high auto-ignition oil temperature is desirable. EV-Silicon Oil-740 provides exceptionally high resistance to oxidation and thermal stability when compared with mineral diffusion pump oils.
EV-Silicon Oil-740 is a popular product that can offer comparable vacuum to DC704 but at a very low price.


EV-Silicon Oil-740 is available in:

1 kilo – article number: 100710
5 kilo – article number: 100712
20 kilo – article number: 100713
100 kilo – article number: 100714

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

Technical data

Saturated Vapour Pressure @ 25ºC: 5.0 X 10-8 torr
Average Boiling Range @ 5.0 X 10-1 torr: 35ºC
Mid Range Boiling @ 5.0 X 10-1 torr: 215ºC
Initial Boiling Point @ 5.0 X 10-1 torr (192ºC): <0.1gr: = 0.025% Wt.
Molecular Weight (typical): 480 g/mol
Flash Point: >230ºC
Viscosity @ 40ºC Nominal: 28 cst
Viscosity @ 25ºC Nominal: 53 cst
Specific Gravity @ 25ºC (Typical): 1.07
Colour: Water white
Oil Type: Phenyl-methyl

Safety Data Sheet

Not yet available