professional manufacturer of
Phenylmethyl silicone oil & Diffusion Pump oil


Name of commodity
275 Diffusion Pump Oil
(Equal to Dow Corning 705, MT-705, and HIVAC-F-5)

Structure formula

Performance and Technical Indexes

Appearance and Properties: Colorless transparent liquid

Technical Indexes

     Property      Value
     Viscosity (25°C )mm2/s      ≥165
     Diopter 25°C      ≥1.09
     Specific Gravity        1.090 ~ 1.100
     Flash Point °C      ≥ 243
     Congealing Point °C      ≤ -14~-18
     Minimal Vacuum Level , Pa      Max. 6.65 X 10-8
     saturated vapor pressure, Pa      Max. 6.65 X 10-9


Performance and Applications
With very low saturated vapor pressure and excellent heat stability as well as outstanding oxidation-resistant performance, the product is suitable for high vacuum industry, such as high vacuum smelting industry, high vacuum coating in electronic industry, atomic energy accelerators and electron microscopes and monitors,etc.

Transport as non-hazardous chemicals, keeping away from rain and sunlight.
Shelf life: 3 years. It still can be used after being tested and qualified when exceeding the shelf life

SingShine 275 Diffusion Pump Oil is available in 200 kg Iron Drum, or 25/50kg plastic Drums, or 950kg Totes(IBC).


TEL: 86-0552-2077273 FAX: 86-0552-2067496 MOBILE: 86-15955200213 ADDRESS: Room 1409, Bengbu Building, Huaihe Street 1011#, Bengbu, Anhui, CHINA