Properties: White or off-white powder, chemical reagent main additive etc. The relative density of 4.50, melting point 1580 ° C, mok's hardness 2.5 ~ 3.5. Sex brittle. Insoluble in water and acid, have glass luster. Uses: It is the raw material and manufacturing all kinds of barium compounds. The most useful for oil drilling mud is the deterioration of the agent, the injection of bottom hole pressure to increase the drilling. Also can be used as the pigment, rubber, paper and paint the packing.