Introduction to Ultra-High Vacuum Diffusion Pump Oil IOTA 705 Ultra-High Vacuum Diffusion Pump Oil IOTA 705, also known by its domestic code 275, is a high-performance fluid designed for demanding vacuum applications. This colorless, transparent liquid boasts a viscosity of 170-175 mm²/s at 25°C and a refractive index of 1.5765-1.5785. With a relative density of 1.090-1.10 and a flash point exceeding 243°C, IOTA 705 is highly stable under extreme conditions. Its low saturated vapor pressure (<3 x 10^-10 torr) and exceptional thermal stability make it ideal for ultra-high vacuum environments, achieving vacuum levels below 1×10^-9 to 10^-10 torr. Commonly used in high-vacuum metallurgy, electron microscopy, and atomic accelerators, IOTA 705 is packaged in various sizes, from 1 kg bottles to 200 kg drums, ensuring easy handling and storage.
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