Magnesium Fluoride MgF2 is a colorless tetragonal crystal or powder with a rutile lattice. Odorless, insoluble in water and alcohol, slightly soluble in dilute acid, soluble in nitric acid. The relative density is 3.18, the melting point is 1248°C, and the boiling point is 2260°C. It shows weak purple fluorescence when heated under electric light, and its crystal has good polarization effect, especially suitable for ultraviolet and infrared spectra. Toxic.

Magnesium Fluoride MgF2 is an ionic compound containing only ionic bonds. It reacts with strong oxidants and can be dissolved by adding nitric acid.

Although the chemical properties of Magnesium Fluoride MgF2 are very stable, it will not decompose when heated, and it is difficult to separate even with strong electrolysis, so it is generally not harmful to the human body, but long-term exposure will also cause certain harm to the human body, such as: causing dental fluorosis and fluoride Osteopathy. If Magnesium Fluoride MgF2 is taken orally directly, it will cause salivation, nausea, vomiting, diarrhea and abdominal pain, followed by tremor, coma, and death due to respiratory paralysis.