It is a Colorless crystal or white powder with relative density of 3.148, mp 126 C,bp 2239 C. It is soluble in nitric acid, slightly soluble in diluted acid, insoluble in water and alcohol. Applications It is used as flux of smelting magnesium, as additive of electrolysis aluminium, in coating optical lenses and filter, in coating agent of titanium pigment, in fluorescent agent of cathode ray screen. It is also used in ceramic and glass industry. Specification MgF2 98%min F 46%min Mg 30%min Ca 0.5%max SiO2 1.2%max Fe2O3 0.80% H2O 5.0%max LOI 20%max Size -200mesh 80%min Packing: in 25kgs PP bags or 1000kgs big bags, or according to customer requirement.