Product English Name Properties: Potassium Cryolite is a cryolite mixture salt, composed of potassium fluoride and cryolite. It is a white or grey solid with a molar mass of 258.17 g/mol and a density of 2.9 g/cm3. Potassium Cryolite salt is highly stable under normal temperatures and pressures, and has a low toxicity. Its melting point is 1180 °C. Propert Brand No. Chemical Composition(%) K/Al F K Al Na Fe2O3 SO₄²- H2O ≥ ≤ GradeⅠ 50 29.5 17.5 0.2 0.01 0.15 1.5 1.18-1.22