Thorium Dioxide (ThO2), wotchedwansothorium (IV) oxide, ndi gwero la Thorium losasungunuka kwambiri. Ndi kristalo wolimba ndipo nthawi zambiri woyera kapena wachikasu mumtundu. Amatchedwanso thoria, amapangidwa makamaka ngati mankhwala opangidwa ndi lanthanide ndi uranium. Thorianite ndi dzina la mineralological mawonekedwe a thorium dioxide. Thorium imayamikiridwa kwambiri pakupanga magalasi ndi ceramic ngati pigment yachikasu yonyezimira chifukwa imawonekera bwino kwambiriKuyeretsa Kwambiri (99.999%) Thorium Oxide (ThO2) Powder pa 560 nm. Zosakaniza za okosijeni sizimayendera magetsi.