Colorless transparent oily liquid, slight amine odor. Melting point -24.4 . Boiling point 203 ; 150 (30.66kpa); 135 (13.33kpa); 81 ~ 82  (1.33kpa). Flash point 95. The relative density of 1.0260 (25/25 ). Refractive index nd (25 ) 1.486. Viscosity  1.65mpas. With water, alcohols, ethers, esters, ketones, halogenated hydrocarbons, aromatic hydrocarbon miscible. Low volatility, thermal stability, chemical stability are good.