Silicone Diffusion Pump Oil IOTA704, also known as 1,1,5,5-Tetraphenyl-1,3,3,5-tetramethyltrisiloxane, is a cutting-edge solution for high-vacuum applications, showcasing exceptional performance in challenging environments. Silicone Diffusion Pump Oil IOTA 704-IOTA (phenylsilicone.com)