Barium chloride

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Barium chloride
Other names
Barium muriate
Muryate of Barytes[1]
Barium dichloride
3D model (JSmol)
ECHA InfoCard 100.030.704
EC Number
  • 233-788-1
RTECS number
  • CQ8750000 (anhydrous)
    CQ8751000 (dihydrate)
  • [Ba+2].[Cl-].[Cl-]
Molar mass 208.23 g/mol (anhydrous)
244.26 g/mol (dihydrate)
Appearance White solid
Density 3.856 g/cm3 (anhydrous)
3.0979 g/cm3 (dihydrate)
Melting point 962 °C (1,764 °F; 1,235 K) (960 °C, dihydrate)
Boiling point 1,560 °C (2,840 °F; 1,830 K)
31.2 g/100 mL (0 °C)
35.8 g/100 mL (20 °C)
59.4 g/100 mL (100 °C)
Solubility soluble in methanol, insoluble in ethanol, ethyl acetate[2]
-72.6·10−6 cm3/mol
orthogonal (anhydrous)
monoclinic (dihydrate)
Std enthalpy of
−858.56 kJ/mol
Main hazards Acute Toxic
NFPA 704

Flash point Non-flammable
U.S. Permissible
exposure limit (PEL)
TWA 0.5 mg/m3[3]
Related compounds
Other anions Barium fluoride
Barium bromide
Barium iodide
Other cations Beryllium chloride
Magnesium chloride
Calcium chloride
Strontium chloride
Radium chloride
Lead chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Barium chloride is a chemical substance. It is among the most important salts of barium. It is soluble in water. It is a poison. When it is heated, it gives a yellow or green color to the flame. It is hygroscopic, meaning that it attracts water from the air. It is mainly used to purify brine but applications include fireworks.

Barium chloride is toxic. Sodium sulfate may be an antidote.

References[change | change source]

  1. Chemical Recreations: A Series of Amusing and Instructive Experiments, which May be Performed with Ease, Safety, Success, and Economy ; to which is Added, the Romance of Chemistry : An Inquiry into the Fallacies of the Prevailing Theory of Chemistry : With a New Theory and a New Nomenclature. R. Griffin & Company. 1834. Archived from the original on 2023-03-13. Retrieved 2023-03-13.
  2. Handbook of Chemistry and Physics, 71st edition, CRC Press, Ann Arbor, Michigan, 1990.
  3. NIOSH Pocket Guide to Chemical Hazards. "#0045". National Institute for Occupational Safety and Health (NIOSH).