THALLIUM (I) OXIDE
Reaction- Product Name
- THALLIUM (I) OXIDE
- CAS No.
- 1314-12-1
- Chemical Name
- THALLIUM (I) OXIDE
- Synonyms
- Tl2-O;THALLIUM OXIDE;Thallous oxide;dithalliumoxide;Oxydithallium(I);THALLIUM MONOXIDE;THALLIUM(+1)OXIDE;THALLIUM (I) OXIDE;Thallium monooxide;THALLIUM(OUS) OXIDE
- CBNumber
- CB0287283
- Molecular Formula
- OTl2
- Formula Weight
- 424.76
- MOL File
- 1314-12-1.mol
THALLIUM (I) OXIDE Property
- Melting point:
- about 300°
- Boiling point:
- 1080℃ [HAW93]
- Density
- 9.520
- solubility
- soluble in H2O, ethanol
- form
- black rhombohedral crystals
- color
- black rhomb crystals, crystalline; hygroscopic
- Water Solubility
- soluble H2O, hydrolyzes to hydroxide; soluble alcohol [MER06]
- CAS DataBase Reference
- 1314-12-1
- EPA Substance Registry System
- Thallium oxide (Tl2O) (1314-12-1)
Safety
- RIDADR
- 1707
- HazardClass
- 6.1(a)
- PackingGroup
- II
THALLIUM (I) OXIDE Chemical Properties,Usage,Production
Reaction
Thallium oxide slowly oxidizes to thallic oxide, Tl2O3 on exposure to air, gradually becoming insoluble in aqueous solution.
Physical properties
Thallium monooxide is a black powder; orthorhombic crystals; hygroscopic; density 9.52g/cm3; melts at 596°C; vaporizes at about 1,080°C; soluble in water, alcohol and acids.
Uses
In manufacture of glass of a high coefficient of refraction for optical purposes (thallium flint glass) and for artificial gems.
Preparation
Thallium oxide can be made by heating Tl metal in air or oxygen. The brown-black thallic oxide, Tl2O3 , that may also form begins to lose oxygen at about 100°C converting to thallium oxide, Tl2O.
Thallium oxide also can be prepared by thermal dissociation of thallium hydroxide, TlOH or thallium carbonate, Tl2CO3 Thallium oxide dissolves in water forming thallous hydroxide, TlOH. It reacts with carbon dioxide to form thallous carbonate, Tl2CO3.
Hazard
Toxic by ingestion.