Potassium K Cryolite Abrasives Potassium Fluoroaluminate K3AlF4 Product Description: The fluoroaluminate is formed by reacting anhydrous hydrofluoric acid with aluminum hydroxide, then reacting with potassium hydroxide at a high temperature, filtering, drying, melting, and crushing. It can also be prepared by reacting aluminum fluoride, ammonium fluoride and potassium chloride.Physicochemical properties: traits White or light gray powder. Slightly soluble in water. Toxic!