...ompare Specifications Specifications ECO-704 DC-704 (Dow Corning, Discontinued) Chemical Profile Tetramethyltetraphenyl-Trisiloxane Tetramethyltetraphenyl-Trisiloxane Color Transparent Transparent Ultimate Vacuum (untrapped) 10E-7 to 10E-8 torr 10E-7 to 10E-8 torr Extrapolated Vapor Pressure 2 x 10E-8 torr 2 x 10E-8 torr Specific Gravity at 25°C 1.07 1.07 Viscosity at 25°C 39 cSt 39 cSt Flash Point (open cup) 221°C 221°C Boiling Point (at 0.5 torr) 215°C 215°C Hazardous Ingredients None None