Sodium thiosulfate wani sinadari ne mai hade da dabara Na2S2O3. Hakanan ana kiranta da sodium hyposulfite ko "hypo". Filin yana kunshe da ions sodium (Na ) da thiosulfate ions (S2O3^2-).Sodium thiosulfate ana yawan amfani da shi azaman madaidaicin wakili a cikin daukar hoto don cire halide na azurfa da ba a bayyana ba daga emulsions na hoto. Hakanan ana amfani da ita a aikace-aikacen masana'antu daban-daban kamar hakar zinari da azurfa, maganin ruwa, da kuma azaman wakili mai rage halayen sinadarai.A cikin magunguna, ana amfani da sodium thiosulfate azaman maganin guba na cyanide. Yana aiki ta hanyar mayar da martani tare da cyanide don samar da wani hadadden hadaddun da ba shi da lahani wanda za a iya fitar da shi daga jiki. Na), kuma "thiosulfate" yana nufin anion (S2O3 ^ 2-) wanda ya ƙunshi zarra guda biyu na sulfur da atom na oxygen guda uku.