Titanium(III) oxide

Synonym(s):Dititanium trioxide;Titanium sesquioxide

CAS NO.：1344-54-3
Empirical Formula: O3Ti2
Molecular Weight: 143.73
MDL number: MFCD00036278
EINECS: 215-697-9
SAFETY DATA SHEET (SDS)
Update Date: 2026-07-29 20:57:39

What is Titanium(III) oxide?

Chemical properties

violet sintered tablets; hexagonal; oxidizes to TiO2; sintered material of 99.9% purity used as an evaporation material for interference films, thin film resistors and capacitors [KIR83] [CER91]

Physical properties

Dark-violet to purple-violet solid. It can be prepared by mixing stoichiometric amounts of Ti and TiO₂ heated in a Mo-crucible at 1600°C. Slightly paramagnetic solid with χ_m= +63 × 10^–6emu.

The Uses of Titanium(III) oxide

Titanium(III) oxide is used to study the bioacceptability of medical implant surfaces.

The Uses of Titanium(III) oxide

Oxides of titanium find wide range of applications extending from photocatalysis, gas sensing to antibacterial, protective and anti-reflecting coatings.

Preparation

Titanium sesquioxide(Ti₂O₃) has a corundum structure and is isomorphous with hematite and ilmenite. It may be prepared by reduction of titania by hydrogen gas at 1000°C or as powder by reacting titanium metal with a stoichiometric amount of TiO₂ at 1600°C as follows:
Ti(s) + 3TiO₂(s) —> 2 Ti₂O₃(s) (1600°C)

Properties of Titanium(III) oxide

Melting point:	2130°C
Density	4.49 g/mL at 25 °C(lit.)
solubility	soluble in hot HF
form	Powder
Specific Gravity	4.6
color	black hexagonal, hexane crystals, crystalline
Water Solubility	Insoluble in water.
Crystal Structure	Trigonal
Dielectric constant	110.0（Ambient）
CAS DataBase Reference	1344-54-3(CAS DataBase Reference)
NIST Chemistry Reference	Dititanium trioxide(1344-54-3)
EPA Substance Registry System	Titanium oxide (Ti2O3) (1344-54-3)

Safety information for Titanium(III) oxide

Signal word	Warning
Pictogram(s)	Flame Flammables GHS02
GHS Hazard Statements	H226:Flammable liquids
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P240:Ground/bond container and receiving equipment. P241:Use explosion-proof electrical/ventilating/lighting/…/equipment. P242:Use only non-sparking tools. P243:Take precautionary measures against static discharge. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P370+P378:In case of fire: Use … for extinction. P403+P235:Store in a well-ventilated place. Keep cool.