Synonym: Magnesium silicofluoride Molecular Formular: MgSIF6.6H2O Molecular weight: 274.48 CAS No.: 12449-55-7 Properties: MgSIF6.6H2O is a Colorless or white diamond or needle crystal. Tasteless. The relative density of 1.788. not to be easy deliquescence, but can be weathering and lose the crystallization water. Soluble in water, but soluble in dilute acid, hydrofluoric acid soluble in, not soluble in alcohol. Become acidic aqueous solution, and alkali role of corresponding generated fluoride and silica.Toxic. Applications: It is used as hardening agent and waterproof agent for concrete to improve rigidit yand intensity, in handlingfluoride efflorescence of silica building, in ceramic industry. It prevents and kills off insect pests from textile. It is used as insecticide etc.