The chemical formula is TiO2. An oxide.
As a white pigment, titanium dioxide has been widely used in cosmetics and coating products. Its chemical and physical properties are extremely stable under normal temperature and pressure. It is insoluble in acids, alkalis, water and general organic solvents, and does not even react with gases with strong chemical reactions such as chlorine and hydrogen sulfide. Therefore, it has the advantages of durability, wear resistance, high safety, economy and wide practical use.
Titanium is a silver-gray metal with a mass between iron and aluminum. Its unit weight is about twice that of iron and six times that of aluminum. Its corrosion resistance is high, and its conductivity and thermal conductivity are relatively low in metals. The melting point is 1,688 degrees. Titanium ranks fourth in the earth's metal elements, and most of it exists in the oxidized form of titanium dioxide throughout the earth. Titanium dioxide is a good and commercially valuable photocatalyst material. The crystal of titanium dioxide can be divided into three types: rutile, anatase, and brookite. Among them, anatase is the most commonly used photocatalyst, and its catalytic activity is also the strongest and most hydrophilic.