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7440-39-3

Basic Information
CAS No.: 7440-39-3
Name: Barium
Molecular Structure:
Molecular Structure of 7440-39-3 (Barium)
Formula: Ba
Molecular Weight: 137.33
Synonyms: Bariumelement;
EINECS:
Density: 3.6 g/mL at 25 °C(lit.)
Melting Point: 725 °C(lit.)
Boiling Point: 1640 °C(lit.)
Flash Point:
Solubility: Insoluble(decomposes)
Appearance: rod
Hazard Symbols: Flammable (pyrophoric) at room temperature in powder form; store under inert gas, petroleum, or other oxygen-free liquid. When heated to approximately 200C in hydrogen, barium reacts violently, forming BaH2. TLV: for all soluble barium compounds, 0.5 mg/m3 (as barium).
Risk Codes: 25-26-34
Safety: Water and stomach acids solubilize barium salts and can cause poisoning. Symptoms are vomiting, colic, diarrhea, slow irregular pulse, transient hypertension, and convulsive tremors and muscular paralysis. Death may occur in a few hours to a few days. Half-life of barium in bone has been estimated at 50 days. Dust is dangerous and explosive when exposed to heat, flame, or chemical reaction. Violent or explosive reaction with water, CCl4, fluorotrichloromethane, trichloroethylene, and C2Cl4. Incompatible with acids, C2Cl3F3, C2H2FCl3, C2HCl3 and water, 1,1,2-trichlorotrifluoroethane, and fluorotrichloroethane. The powder may ignite or explode in air or other oxidizing gases. See also BARIUM COMPOUNDS (soluble).

Analytical Methods:

   

For occupational chemical analysis use NIOSH: Barium, Soluble Compounds, 7056.

Transport Information: UN 3264 8
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  • 7440-39-3               Ba             Barium

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