MT-702 Diffusion Pump Oil - One Gallon | High Vacuum | Dow Corning Equivalent

Description

MTS Offers 702, 704 & 705 Pump Oil & Dow Corning High Vacuum Grease
This listing is for our MT-702 diffusion pump oil.
Dow Corning no longer offers DC-702, DC-704, and DC-705 for sale to the general market. Midwest Tungsten has filled the gap by offering private label 702, 704, and 705 chemically equivalent products in gallon containers and 500 cc bottles. Our MT-702, MT-704, and MT-705 are all in stock for immediate delivery.
MT-702
diffusion pump fluid is a general purpose fluid designed for fast pumping of large volumes of gas. It is used to produce vacuums in the range of 10E-5 to 10E-7 torr. It is also used in vapor ejector pumps that attain vacuum of 10E-4 to 10E-5 torr.  Replacement for and equivalent to Dow Corning DC-702. Sold as DS-702 and Invoil 702 elsewhere.
MT-704 and MT-705 are available in separate listings.
SPECIFICATION
MT-702
MT-704
MT-705
Molecular Description
Mixed phenylmethyl dimethyl cyclosiloxane
Tetramethyl tetraphenyl trisiloxane
Pentaphenyl trimethyl trisiloxane
Color
Clear
Light Straw
Clear/Light Straw
Ultimate Untrapped Vacuum (torr)
10E-5
10E-7 to 10E-8
5 E-9
Ultimate Trapped Vacuum
–
to 10E-11
to 10E-11
Extrapolated Vapor Pressure at 25 ºC
1 x 10E-6
2.1 x 10E-8
5 x 10E-10
Specific Gravity at 25 ºC
1.07
1.07
1.09
Viscocity at 25 ºC
45
39
175
Flash Point, open cup (ºC)
193
221
243
Boiling point, 0.5 torr (ºC)
180
215
245
Typical Boiler Temperature (ºC)
190
220
260
Heat of Vaporization (kcal/gm mole)
21.7/190 ºC
25.5/200 ºC
28.2/250 ºC
Surface Tension (dynes)
30
37.3
36.5
Molecular Weight
–
484
546
Price per gallon
5.00
5.00
5.00