Titanium dioxide (TiO2) is a naturally occurring oxide of titanium with the chemical formula TiO2. It is commonly used as a white pigment in a variety of products, including paints, coatings, plastics, paper, inks, cosmetics, and food. Titanium dioxide is known for its brightness and high refractive index, which makes it an ideal pigment for achieving opacity and enhancing the whiteness and brightness of products.

In addition to its use as a pigment, titanium dioxide also has other applications. It is used as a photocatalyst in environmental purification processes, such as air and water treatment, due to its ability to catalyze the decomposition of organic pollutants under UV light. Titanium dioxide is also utilized in sunscreen formulations as a UV filter, providing protection against harmful ultraviolet rays. Overall titanium dioxide is a versatile and widely used material with diverse applications across various industries.