what is aluminum

Aluminum (Aluminium) is a metal element, the element symbol is Al, and the atomic number is 13. Its element is a silver-white light metal. Extensible. Commodities are often made into rods, sheets, foils, powders, ribbons and filaments. In moist air, it can form an oxide film that prevents metal corrosion. Aluminum powder can burn violently when heated in the air, and emit a dazzling white flame. Soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water. Relative density 2.70. Melting point 660 ℃. Boiling point 2327 ℃. The content of aluminum in the earth's crust is second only to oxygen and silicon, ranking third, and it is the most abundant metal element in the earth's crust. The development of the three important industries of aviation, construction and automobiles requires the material properties to have the unique properties of aluminum and its alloys, which greatly facilitates the production and application of this new metal aluminum. The application is very wide.

On October 27, 2017, the list of carcinogens published by the World Health Organization's International Agency for Research on Cancer was preliminarily sorted out for reference, and aluminum products were included in the list of Class I carcinogens.