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Barium Structure

Barium

  • Product NameBarium
  • CAS7440-39-3
  • CBNumberCB0854186
  • MFBa
    Lewis structure
  • MW137.33
  • EINECS231-149-1
  • MDL NumberMFCD00134031
  • MOL File7440-39-3.mol
  • MSDS FileSDS

Chemical Properties

Melting point 725 °C(lit.)
Boiling point 1640 °C(lit.)
Density  3.6 g/mL at 25 °C(lit.)
storage temp.  water-free area
solubility  reacts with H2O; slightly soluble in ethanol
form  rod
Specific Gravity 3.51
color  Silver-gray
Resistivity 50.0 μΩ-cm, 20°C
Water Solubility  soluble with H2 evolution in cold H2O and hot H2O; slightly soluble alcohol; insoluble benzene [CRC10]
Sensitive  air sensitive, moisture sensitive
Merck  13,967
Exposure limits TLV-TWA 0.5 mg/m3 (for soluble compounds) (ACGIH and MSHA); IDLH (for soluble compounds) 250 mg/m3 (NIOSH). .
Stability Stability Reacts vigorously or violently with acids, water, tetrachloromethane, small halogenated hydrocarbons. Should be stored under an inert material such as petroleum ether to exclude air. Flammable.
EPA Primary Drinking Water Standard MCL:2,MCLG:2
FDA 21 CFR 165.110
CAS DataBase Reference 7440-39-3(CAS DataBase Reference)
EWG's Food Scores 1-3
NCI Dictionary of Cancer Terms barium solution
FDA UNII 24GP945V5T
EPA Substance Registry System Barium (7440-39-3)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H228-H260-H301-H314
Precautionary statements P210-P231+P232-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  C,Xi,F
Risk Statements  25-26-34-36/37/38-14/15-11
Safety Statements  23-26-36-36/37/39-45-43-36/37-16
RIDADR  UN 3264 8/PG 3
WGK Germany  3
RTECS  CQ8370000
TSCA  Yes
HS Code  2805 19 10
HazardClass  8
PackingGroup  III
Hazardous Substances Data 7440-39-3(Hazardous Substances Data)
Toxicity An element; the heaviest of the stable alkaline earths. Barium sulfate is used as a diagnostic aid in radiology due to its radio-opaqueness and, because of its insolubility and lack of absorption, it is safe barring iatrogenic episodes. Poisoning usually results from deliberate or accidental ingestion of soluble barium compounds. The Ba2+ ion is a muscle poison due to the blocking of the K1 channels of the Na+/K+ pump in cell membranes. Because cases of barium poisoning are accompanied by severe hypokalemia, potassium infusion is an effective antidote. The toxicity of barium compounds depends on their solubility, with the free ion being readily absorbed from gastrointestinal tract or lung, whereas the sulfate is essentially unabsorbed. Thus, administration of soluble sulfates immediately after ingestion is another effective antidote.
IDLA 50 mg Ba/m3
NFPA 704:
4
1 3

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