Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by form]
6. [materials by chemical form]
7. compounds (materials)

Anotations

Scope note:

A naturally occurring oxide of titanium, having the chemical formula TiO2. It is a very stable compound with a high refractive index, used in food coloring, sunscreen, as a pigment, and in other applications.