Invoil C pump oil (EMS)
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Invoil C pump oil (EMS)

Consist of esters or specially selected hydrocarbon fractions. They were developed for vapour-diffusion pump fluids:High purity, very low pressure, very stable.Pressures lower than 10-7 torr obtainableNo need for cold trap.Good pumping speed.No corrosive deposits or vapours.Physical Properties of Apiezon Oil Type C (now Invoil C)

Consist of esters or specially selected hydrocarbon fractions. They were developed for vapour-diffusion pump fluids:

  • High purity, very low pressure, very stable.
  • Pressures lower than 10-7 torr obtainable
  • No need for cold trap.
  • Good pumping speed.
  • No corrosive deposits or vapours.


Physical Properties of Apiezon Oil Type C (now Invoil C)

Diffusion Pump Oil Type C
Vapour Pressure,torr @20?C 10-7
Boiling Point,?C @ 1 torr 225
Flash Point (open cup)?F 510
Pour Point(ASTM)?F 5
Density, g/mL @ 20?C 0.875
@ 40?C 0.863
Viscosity, kinematic,cS @ 20?C 283
@ 50?C 90
@ 100?C 10.6
Coefficient of Expansion per
?C over 20-30?C (ASTM) 0.00069
Thermal Conductivity Btu/in 0.96


INVOIL C
Obtains the highest vacuum pressure (10-7 torr) of the Apiezon oils without the need of a cold trap. Suitable for most diffusion pump applications, including in electron microscopes and in vacuum coaters. This is an economic and effective substitute for Santovac 5 fluid. It should be noted that the ultimate vacuum is dependent on a suitably high backing vacuum and the out-gasing of TEM film and column components. Consequently the ultimate vacuum attained with Invoil C (Apiezon C) is very close to the theoretically much superior Santovac 5.

This product is not hazardous and does not require an MSDS.

NOTE: Formerly Apiezon C oil

Updated: 02-01-2025
Code Title Pack Size Availability Price Updated: 02-01-2025
M1-C-00100-X Invoil C pump oil (EMS) 100ml 0 in stock (?) $118.00 AUD
M1-C-00500-X Invoil C pump oil (EMS) 500ml 0 in stock (?) $451.00 AUD