Barium chloride

Barium chloride
Names
	Other names Barium muriate; Muryate of Barytes; Barium dichloride
Identifiers
CAS Number	10361-37-2 ; 10326-27-9 (dihydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	23540 ;
ECHA InfoCard	100.030.704
EC Number	233-788-1;
PubChem CID	25204;
RTECS number	CQ8750000 (anhydrous) ; CQ8751000 (dihydrate);
UNII	0VK51DA1T2 ;
CompTox Dashboard (EPA)	DTXSID7044508 ;
	SMILES [Ba+2].[Cl-].[Cl-];
Properties
Chemical 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 (1,764 °F; 1,235 K) (960 °C, dihydrate)
Boiling point	1,560 °C (2,840 °F; 1,830 K)
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
Magnetic susceptibility (χ)	-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	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 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.