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Related to thorium dioxide: vinyl chloride
thorium dioxide[′thȯr·ē·əm dī′äk‚sīd]
ThO2 A heavy, white powder soluble in sulfuric acid, insoluble in water, melts at 3300°C; used in medicine, ceramics, flame spraying, and electrodes. Also known as thoria; thorium anhydride; thorium oxide.