Titanium dioxide, also known as titania, is a white, odorless, inorganic compound with the chemical formula TiO2. It's derived from titanium and has a melting point of 1,843 °C and a boiling point of 2,972 °C. Titanium dioxide is insoluble in water, but mineral forms can appear black. 

Titanium dioxide is used in many products, including cosmetics, pharmaceuticals, and oral exposure products. In cosmetics, it's used as an ultraviolet filter in sunscreens and lip balms. It's also used in pressed and loose powders, but you should avoid these products if they contain titanium dioxide. 

Titanium dioxide is cost-effective and has good chemical stability. It's also a n-type semiconductor with high dielectric permittivity and photocatalytic bacterial activity

Titanium dioxide (TiO2) is a white, chemically inert, semiconducting powder with many uses: 

Food and pharmaceuticals

TiO2 is used as an additive to whiten and texture foods, and in oral pharmaceutical formulations. It's also used in sunscreens to protect the skin from harmful radiation. 

Personal care products

TiO2 is used in sunscreens, pressed powders, and loose powders as a UV filter or whitening agent. It can also be used in lotions and creams. 

Paints, papers, and cosmetics

TiO2's ability to scatter light and have a high refractive index allows for low levels of pigment to achieve opacity. It can be used in paints to provide opacity and durability, and in paper to make it whiter, brighter, and more opaque. In cosmetics, it can be used to help hide blemishes and brighten the skin. 

Plastics, adhesives, and rubber

TiO2 can help minimize the brittleness, fading, and cracking that can occur in plastics and other materials as a result of light exposure. 

Auto-lubricants

TiO2 can be found in auto-lubricant products such as greases, gear, and engine oil. It can also be found in industrial-grade lubricants such as hydraulic, turbine, and compressor oils. 

Other uses

TiO2 can also be used to decontaminate water and food, test the pH of soil, and in water splitting, air purification, self-cleaning, and bacterial degradation.