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Descriptor in English: Thorium Dioxide
Descriptor in Spanish: Dióxido de Torio
Descriptor in Portuguese: Dióxido de Tório
Descriptor in French: Dioxyde de thorium
Entry term(s): Dioxide, Thorium
Oxide, Thorium
Thorium Oxide
Thorotrast
Tree number(s): D01.650.550.875
D01.930.930
Scope note: Thorium oxide (ThO2). A radiographic contrast agent that was used in the early 1930s through about 1954. High rates of mortality have been linked to its use and it has been shown to cause liver cancer.
Allowable Qualifiers: AA analogs & derivatives
AD administration & dosage
AE adverse effects
AN analysis
CH chemistry
CL classification
CS chemical synthesis
EC economics
HI history
IP isolation & purification
ME metabolism
PD pharmacology
PK pharmacokinetics
PO poisoning
RE radiation effects
SD supply & distribution
ST standards
TO toxicity
TU therapeutic use
History Note: 65
DeCS UI: 14296
Descriptor UI: D013911
Date Established: 1965/01/01
Date of Entry: 1999/01/01
Revision Date: 2013/07/08
Thorium Dioxide - Preferred
Concept UI M0021413
Scope note Thorium oxide (ThO2). A radiographic contrast agent that was used in the early 1930s through about 1954. High rates of mortality have been linked to its use and it has been shown to cause liver cancer.
Preferred term Thorium Dioxide
Entry term(s) Dioxide, Thorium
Oxide, Thorium
Thorium Oxide
Thorotrast - Narrower
Concept UI M0021414
Preferred term Thorotrast



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