Magnesium fluoride (MgF2) is an inorganic compound with formula MgF2. The compound is a white crystalline salt and transparent over a wide range of wavelength. Applications Optical Coating Optical windows Lenses Modulating panels Anti-counterfeit material Other optical components Properties Grade: optical Assay:≥99.9% or 99.99% Form: random crystal or powder CAS No. : 7783-40-6