Characters white viscous liquid, viscosity of about (100 ~ 350) × 10-6m2 / s, the relative density of 0.98 ~ 1.02, almost odorless, insoluble in water (which can be dispersed in water), ethanol, methanol, soluble in aromatic hydrocarbons material, aliphatic hydrocarbons and chlorinated hydrocarbons (such as benzene, carbon tetrachloride, etc.). Chemical stability, non-volatile, non-flammable, non-corrosive metal, for a long time in air is not easy to gel.