Thorium dioxide

Agent Name
Thorium dioxide
CAS Number
1314-20-1
Formula
O2-Th
Major Category
Physical/Radiation
Synonyms
Thorianite; Thorium anhydride; Thorium oxide; Thorium oxide (ThO2); Thorium-232 dioxide; Thorotrast; Thortrast; Umbrathor; [ChemIDplus]
Category
Radioactive Compounds
Description
White powder; [CAMEO]
Sources/Uses
"Used in high-temperature ceramics, gas mantles, nuclear fuel, flame spraying, crucibles, non-silica optical glass, catalysis, filaments in incandescent lamps, cathodes in electron tubes and arc-melting electrodes." [CAMEO] Has been used as a radiopaque material in diagnostic radiology; [Merck Index]
Comments
See "Thorium."
Biomedical References

Exposure Assessment

Explanatory Notes
Insoluble in water; Soluble in hot H2SO4; mp = 3220 degrees C; [ATSDR ToxProfiles]

Diseases, Processes, and Activities Linked to This Agent

Processes

Industrial Processes with risk of exposure: