Aluminum, silver-white light metal. It is malleable. Products are often made into rods, sheets, foils, powders, ribbons and filaments. In humid air, an oxide film can be formed to prevent metal corrosion. Aluminum powder burns violently when heated in the air and emits a dazzling white flame. Easily soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solutions, but insoluble in water. Relative density 2.70. Melting point 660 degree . Boiling point 2467 degree .