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Barium chloride
Barium chloride.jpg
Other names Barium muriate
Muryate of Barytes
Barium dichloride
Identifiers
CAS number 10361-37-2
PubChem 25204
EC number 233-788-1
RTECS number CQ8750000 (anhydrous)
CQ8751000 (dihydrate)
SMILES [Ba+2].[Cl-].[Cl-]
Properties
Molecular formula BaCl2
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, 1235 K, 1764 °F

Boiling point

1560 °C, 1833 K, 2840 °F

Solubility in water 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
-72.6·10−6 cm3/mol
Structure
Crystal structure orthogonal (anhydrous)
monoclinic (dihydrate)
Coordination
geometry
7-9
Thermochemistry
Std enthalpy of
formation ΔfHo298
−858.56 kJ/mol
Hazards
Main hazards Acute Toxic
NFPA 704

NFPA 704.svg

0
3
0
 
Flash point Non-flammable
U.S. Permissible
exposure limit (PEL)
TWA 0.5 mg/m3
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 noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

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.

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