The product name

250 Phenylmethyl silicone oil

255 Phenylmethyl silicone oil

275 Ultra high vacuum diffusion pump oil

appearance

Colorless to light yellow transparent oily matter

Colorless to light yellow transparent oily matter

Colorless transparent oil

Viscosity mm² ∕ S: 25℃

25~40

50~80s

165~185

Refractive index no (25℃)

1.4700~1.4800

1.4800~1.4950

1.5765~1.5785

Relative density (25℃)

1.010~1.080

1.020~1.080

1.090~1.100

Flashing point

≥240

≥280

≥243

Freezing point ℃

-45

-40

-14~-18

final vacuum (Pa)

﹤6.65×10-8

saturated vapor pressure (Pa)

﹤6.65×10-9

Nature and purpose of

Low viscosity, low freezing point, fine heat resistance, high relative flashing point, small expansion factor, excellent behaviour of electricity;
Used in insulation impregnant and plasma bag, basic oils of department of surgery, cosmetics, skin care agent and so on

Besides has general characteristics of methyl silicone oil, still has a good thermal stability, oxidation resistance, lubricity, radiation resistance, low freezing point and the water stability, used for insulating, lubrication and damping, shock, dust with high temperature and carrier.This product can replace Japan Shin_Etsu products.

Have very low saturated vapor pressure and good thermal stability and excellent oxidation resistance, used in high vacuum metallurgy industry, valve industry, high vacuum layer (film), atomic energy accelerator and electron microscope, display, etc.This product can replace Japan Shin_Etsu products.