Cesium chloride (Cesium chloride) is an inorganic salt, chemical formula CsCl, molecular weight 168.36, is colorless cubic crystal, soluble in water, ethanol, methanol, insoluble in acetone, easy to absorb moisture in the air. It is widely used in many fields: in the field of optics, due to its high refractive index and high light transmission, it is used to manufacture optical components and coatings; In the electronics industry, used as a material for the manufacture of electronic devices; In the field of medicine, it has antibacterial, antiviral and anti-tumor effects. In addition, cesium chloride can also be used in the chemical industry as a catalyst and reaction medium, as well as for the preparation of conductive glass, solar cells, etc.