Catalog Number
ACMA00016834
Product Name
Barium Sulfate
Description
Barium sulfate appears as white or yellowish odorless powder or small crystals. Mp: 1580°C (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.;DryPowder; Liquid; WetSolid; WetSolid, Liquid;ODOURLESS TASTELESS WHITE OR YELLOWISH CRYSTALS OR POWDER.;White or yellowish, odorless powder.;White or yellowish, odorless powder.
IUPAC Name
barium(2+);sulfate
Molecular Weight
233.39g/mol
Molecular Formula
BaSO4;BaSO4;BaO4S
Canonical SMILES
[O-]S(=O)(=O)[O-].[Ba+2]
InChI
InChI=1S/Ba.H₂O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
InChI Key
TZCXTZWJZNENPQ-UHFFFAOYSA-L
Boiling Point
2912 °F at 760 mm Hg (Decomposes) (NIOSH, 2016);decomposes;2912°F (decomposes);2912°F (Decomposes)
Melting Point
2876 °F (NIOSH, 2016);1580 °C;2876°F;2876°F
Density
4.25 to 4.5 (NIOSH, 2016);4.49 g/cu cm;4.5 g/cm³;4.25-4.5;4.25-4.5
Solubility
0.0002 % at 64° F (NIOSH, 2016);Very slightly soluble in cold water;0.00031 g/100 g water at 20 °C; insol in ethanol;Soluble in hot concentrated sulfuric acid; practically insoluble in dilute acids and alcohol;Practically insoluble in organic solvents; very slightly soluble in alkalis and in solution of many salts;Solubility in water: none;(64°F): 0.0002%
Color/Form
Fine, heavy powder or polymorphous crystals;White, orthorhombic crystals;White or yellowish powder;Opaque powder
Covalently-Bonded Unit Count
2
EC Number
231-784-4;236-664-5
Exact Mass
233.856977g/mol
MeSH Entry Terms
Barite;Baritop;Barium Sulfate;Barium Sulfate (2:1);E Z CAT;E-Z-CAT;EZCAT;Micropaque Oral;Sulfate, Barium
Monoisotopic Mass
233.856977g/mol
Other Experimental
SOLUBILITY IN WATER INCREASES CONSIDERABLY IN PRESENCE OF CHLORIDE & OTHER ANIONS;1149 °C (transition point monoclinic);Lithopone does not darken in the presence of sulfides;Mohs hardness: 3.3;Heat of formation: -1473.2 kJ/mol; Gibbs energy of formation: -1362.2 kJ/mol; molar entropy: 132.2 J/mol-K; molar heat capacity: 101.8 J/mol-K
Refractive Index
Indices of refraction: 1.636 (alpha), 1.637 (beta), 1.648 (gamma)
Vapor Pressure
0 mm Hg (approx) (NIOSH, 2016);0 mmHg (approx);0 mmHg (approx)
online inquiry
