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Barium chloride

Barium chloride is the inorganic compound with the formula BaCl2. It is one of the most common water-soluble salts of barium. Like most other barium salts, it is colorless, toxic, and imparts a yellow-green coloration to a flame. It is also hygroscopic, converting first to the dihydrate BaCl2(H2O)2. It has limited use in the laboratory and industry.

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Further Information

Names

Other names

Barium muriate
Muryate of Barytes
Barium dichloride

Identifiers

CAS Number: 10361-37-2

JSmol: Interactive image

ChemSpider: 23540

ECHA InfoCard: 100.030.704

EC Number: 233-788-1

PubChem: 25204

RTECS number: CQ8750000 (anhydrous)
CQ8751000 (dihydrate)

UNII: 0VK51DA1T2

Properties

Chemical formula: BaCl

Molar mass: 208.23 g/mol (anhydrous)
244.26 g/mol (dihydrate)

Appearance: White solid

Density: 3.856 g/cm (anhydrous)
3.0979 g/cm (dihydrate)33

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: methanol

Magnetic susceptibility: -72.6·10 cm/mol−63

Structure

Crystal structure: orthogonal

Coordination geometry: 7-9

Thermochemistry

Std enthalpy of
formation: −858.56 kJ/mol

Hazards

Safety data sheet: See:

EU classification: T

R-phrases: R20 R25

S-phrases: (S1/2) S45

NFPA 704:

Flash point: Non-flammable

median dose: 78 mg/kg (rat, oral)
50 mg/kg (guinea pig, oral)

lowest published: 112 mg Ba/kg (rabbit, oral)
59 mg Ba/kg (dog, oral)
46 mg Ba/kg (mouse, oral)

NIOSH

PEL: TWA 0.5 mg/m3

REL: TWA 0.5 mg/m3

IDLH: 50 mg/m3

Related compounds

anions: Barium fluoride

cations: Beryllium chloride

Supplementary data page

Structure and
properties: n

Thermodynamic
data: Phase behaviour

Spectral data: UV

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).