Barium Chloride

Title: Barium Chloride
CAS Registry Number: 10361-37-2
Molecular Formula: BaCl2
Molecular Weight: 208.23
Percent Composition: Ba 65.95%, Cl 34.05%
Literature References: Prepn: Gmelins, Barium (8th ed) 30, 171-175 (1932) and supplement, 179-181, 324-325 (1960). Toxicity studies: I. B. Syed, F. Hosain, Toxicol. Appl. Pharmacol. 22, 150 (1972). Induction of arrhythmia in exptl animals: F. W. Eichbaum, Basic Res. Cardiol. 68, 73 (1973).
Derivative Type: Dihydrate
Properties: Crystals or granules or powder; bitter salty taste. d 3.86; mp 963°. Poisonous! Very sol in water; sol in methanol. Practically insol in ethanol, acetone, ethyl acetate. LD50 i.v. in ICR mice: 19.2 mg Ba2+/kg (Syed, Hosain).
Melting point: mp 963°
Density: d 3.86
Toxicity data: LD50 i.v. in ICR mice: 19.2 mg Ba2+/kg (Syed, Hosain)
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin and upper respiratory system; gastroenteritis; muscle spasm; slow pulse, extrasystoles; hypokalemia; skin burns. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 24.
Use: Manuf pigments, color lakes, glass, mordant for acid dyes; weighting and dyeing textile fabrics; in Al refining; as pesticide; boiler compds for softening water; tanning and finishing leather.
Therap-Cat-Vet: Formerly used as purgative in horses, ruminatoric in cattle.
Barium Chromate(VI) Barium Cyanide Barium Dithionate Barium Ferrocyanide Barium Fluoride

Barium chloride
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Barium chloride.jpg
CAS number 10361-37-2 YesY
10326-27-9 (dihydrate)
ChemSpider 23540 YesY
EC number 233-788-1
RTECS number CQ8750000 (anhydrous)
CQ8751000 (dihydrate)
Jmol-3D images Image 1
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
960 °C (dihydrate)
Boiling point 1560 °C
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[1]
Crystal structure orthogonal (anhydrous)
monoclinic (dihydrate)
Std enthalpy of
formation ΔfHo298
−858.56 kJ/mol
MSDS External MSDS
EU Index 056-004-00-8
EU classification Toxic (T)
Harmful (Xn)
R-phrases R20, R25
S-phrases (S1/2), S45
NFPA 704
NFPA 704.svg
Flash point Non-flammable
Related compounds
Other anions Barium fluoride
Barium bromide
Barium iodide
Other cations Beryllium chloride
Magnesium chloride
Calcium chloride
Strontium chloride
Radium chloride
Lead chloride
Supplementary data page
Structure and
n, εr, etc.
Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Barium chloride is the inorganic compound with the formula BaCl2. It is one of the most common water-soluble salts of barium. Like other barium salts, it is toxic and imparts a yellow-green coloration to a flame. It is also hygroscopic.