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Prices are current as of Sunday, 29/11/2020.
Prices shown are in AUD and GST exclusive. Tax is added at checkout.

AU $128.00
Availability: 1 In Stock
Product Code: M1-C-00100-X

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Apiezon OILS

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

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.
A safety data sheet is available at apiezon.com


Orders with items in stock are packed within 24 hours. We ship with our best choice of courier, depending on goods ordered and shipping address provided.


Standard delivery

Express delivery


Next day



2-3 business days



4-10 business days

2-3 business days


6-14 business days

2-3 business days



5-14 business days

*Note: Delivery times are as provided by our carriers and are estimates only. Delays may occur during peak periods, and due to factors outside the carriers' control.

Standard shipping is $15 in Australia (free on orders over $200). Add $5 to ship Express (under 2kg only)


Order online and collect from our warehouse in Townsville.


Freight Charge

Ready for collection

11 Carlton Street, Kirwan


Once invoice has been emailed
(Less than 1 business day)

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