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Titanium dioxide, also known as titania is the naturally occurring oxide of titanium, chemical formula TiO2. Pure titanium dioxide does not occur in nature but is derived from ilmenite or leuxocene ores. It is also readily mined in one of the purest forms, rutile beach sand.

An important use of titanium dioxide is in powder form as a pigment for providing whiteness and opacity to such products such as paints and coatings but also plastics, paper, inks, food and cosmetics, including most toothpastes. Titanium dioxide is by far the most widely used white pigment, it is very white and has a very high refractive index (n=2.4) — only surpassed by diamond. The high refractive index and bright white colour of titanium dioxide make it an effective opacifier for pigments, and (when deposited as a thin film), as a reflective optical coating for dielectric mirrors. One of its other major advantages is its resistance to discoloration under UV light. With titanium dioxide having the highest refractive index of all the colorless substances known, it provides the best light scattering ability as well as the best hiding power.

ANATASE
Properties: White powder with fine and even particles, nice optical property, high refraction index, highly achromatic, good color shielding power, low oil absorption, highly water dispersible, etc. It has stable chemical property, insoluble in water, resistant to acid, alkaline or heat.
Application: It is widely used in industries such as paint, printing ink, rubber, glass, cosmetic, soap, plastics and paper etc.

RUTILE
Properties: White powder, insoluble in water, fatty acid and weak inorganic acid. slightly soluble in basicity solution, soluble in heated concentrated sulphuric acid, hydrochloric acid, its ability of tinting and hiding power, resistance of climate are stronger than that of the anatase type titanium dioxide.
Application: Suitable for coating of outside building, painting for super car, bridge and so on. It is widely used in plastics, superb industrial paints, and gloss emulsion paints, high quality paper coatings, waxing stock and rubber floorings where high achromatism and good lightfastness are required.