Titanium dioxide
| Names | |
|---|---|
| IUPAC names
Titanium dioxide Titanium(IV) oxide | |
| Other names | |
| Identifiers | |
3D model (JSmol) |
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| ChEBI | |
| ChEMBL | |
| ChemSpider | |
| ECHA InfoCard | 100.033.327 |
| E number | E171 (colours) |
| KEGG | |
PubChem CID |
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| RTECS number |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| TiO 2 | |
| Molar mass | 79.866 g/mol |
| Appearance | White solid |
| Odor | Odorless |
| Density |
|
| Melting point | 1,843 °C (3,349 °F; 2,116 K) |
| Boiling point | 2,972 °C (5,382 °F; 3,245 K) |
| Insoluble | |
| Band gap | 3.21 eV (anatase)
3.15 eV (rutile) |
| +5.9·10−6 cm3/mol | |
Refractive index (nD) |
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| Thermochemistry | |
Std molar entropy (S⦵298) |
50 J·mol−1·K−1 |
Std enthalpy of formation (ΔfH⦵298) |
−945 kJ·mol−1 |
| Hazards | |
| NFPA 704 (fire diamond) | |
| Flash point | not flammable |
| NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 15 mg/m3 |
REL (Recommended) |
Ca |
IDLH (Immediate danger) |
Ca [5000 mg/m3] |
| Safety data sheet (SDS) | ICSC 0338 |
| Related compounds | |
Other cations |
Zirconium dioxide Hafnium dioxide |
| Titanium(II) oxide Titanium(III) oxide Titanium(III,IV) oxide | |
Related compounds |
Titanic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Titanium dioxide, also known as titanium(IV) oxide or titania /taɪˈteɪniə/, is the inorganic compound derived from titanium with the chemical formula TiO
2. When used as a pigment, it is called titanium white, Pigment White 6 (PW6), or CI 77891. It is a white solid that is insoluble in water, although mineral forms can appear black. As a pigment, it has a wide range of applications, including paint, sunscreen, and food coloring. When used as a food coloring, it has E number E171. World production in 2014 exceeded 9 million tonnes. It has been estimated that titanium dioxide is used in two-thirds of all pigments, and pigments based on the oxide have been valued at a price of $13.2 billion.