Barium sulfate wani sinadari ne mai suna BaSO4. Wani fari ne mai kauri wanda ba shi da wari kuma ba ya narkewa a cikin ruwa. An fi amfani da shi azaman wakili mai bambanci a cikin hanyoyin hoto na likita, irin su X-rays da CT scans, don taimakawa wajen hangen nesa na gastrointestinal tract. Ana kuma amfani da Barium sulfate wajen samar da wasu mahadi na barium, da kuma wajen kera roba, robobi, da fenti.