MORESCO’s NEOVAC series continue to offer high quality products worthy of the leader in vacuum pump oils while satisfying every requirement in the area of applied vacuum technology.
Mineral oil type
Viscosity mm2/s(40℃) Flash point ℃ Vapor pressure Pa (50℃) Application
NEOVAC MR-200 71 256 < 1.3 x 10-3 For rotary pump

Details are referred to MORESCO Japan information.
http://www.moresco.co.jp/en/products/vacuum-pump-oil#sub-01