[{"from": "human", "value": "Provide a description of this molecule. [O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[Ba+2]"}, {"from": "gpt", "value": "The molecule appears as white or yellowish odorless powder or small crystals. Mp: 1580 \u00b0C (with decomposition). Density: 4.25 -4.5 g cm-3. Insoluble in water, dilute acids, alcohol. Soluble in hot concentrated sulfuric acid. Used as a weighting mud in oil-drilling, in paints, paper coatings, linoleum, textiles, rubber. Administered internally (\"barium cocktail\") as a radio-opaque diagnostic aid."}]