Nomenclature
CAS number: 1314-20-1
Thorium dioxide; thoria.
O
2Th; mol wt 264.04.
O 12.12%, Th 87.88%.
ThO
2.
Description and references
Review: Keller in Comprehensive Inorganic Chemistry vol.
5, J. C. Bailar, Jr. et al., Eds. (Pergamon Press,
Oxford, 1973) pp 221-223.
Properties
White, heavy, infusible, cryst powder; when heated
is incandescent. d 10.0. mp 3390°.
Insol in water or alkalies. Sol in acids with difficulty.Derivative
Suspension contg 20-25% ThO2.
Description and references
Reviews of tumor induction by Thorotrast:
Looney, Am. J. Roentgenol. Radium Ther. Nucl.
Med. 83, 163-185; Smoron, Battifora, Cancer 30, 1252-1259 (1972).
Caution
Thorium oxide is listed as a known
human carcinogen: Report on Carcinogens,
Eleventh Edition (PB2005-104914, 2004) p III-154.Therapeutic Category
Has been used as diagnostic aid (radiopaque medium).
Keywords
Diagnostic Aid (Radiopaque Medium)