Feature: As silicone type diffusion oil, HIREN DP04V and HIREN DP05V are designed for fast pumping of gas or vapor in large volumes. It delivers low vapor pressure, outstanding resistance of high temperature, low chemical reaction, high flashing point and high surface tension in operational conditions. Uses: Diffusion Pump for Aerospace, Electronics, Metallurgy, Vacuum coatings, Atomic energy, Research and etc. Packing: 1Kg, 20Kg Typical Physical Properties Typical property Unit HIREN DP04V HIREN DP05V specific gravity (25) g/cm3 1.07 1.09 kinematic viscosity (25) cSt 39 175 vapor pressure @20 Torr 2.0x10e-07 3.0x10e-8 Boiling point 215 245 Flash point 221 243 Ultimate Pressure torr 2.0x10e-08 3.0x10e-10 Color Clear Clear