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Barium Struktur

Barium

Bezeichnung:Barium

CAS-Nr7440-39-3

Englisch Name:Barium

CBNumberCB0854186

SummenformelBa

Molgewicht137.33

MOL-Datei7440-39-3.mol

Synonyma

Barium

Barium physikalisch-chemischer Eigenschaften

Schmelzpunkt 725 °C(lit.)
Siedepunkt 1640 °C(lit.)
Dichte 3.6 g/mL at 25 °C(lit.)
storage temp.  water-free area
Löslichkeit reacts with H2O; slightly soluble in ethanol
Aggregatzustand rod
Wichte 3.51
Farbe Silver-gray
Widerstand (resistivity) 50.0 μΩ-cm, 20°C
Wasserlöslichkeit soluble with H2 evolution in cold H2O and hot H2O; slightly soluble alcohol; insoluble benzene [CRC10]
Sensitive  air sensitive, moisture sensitive
Merck  13,967
Expositionsgrenzwerte TLV-TWA 0.5 mg/m3 (for soluble compounds) (ACGIH and MSHA); IDLH (for soluble compounds) 250 mg/m3 (NIOSH). .
Stabilität 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.
CAS Datenbank 7440-39-3(CAS DataBase Reference)
EPA chemische Informationen Barium (7440-39-3)

Sicherheit

Kennzeichnung gefährlicher C,Xi,F
R-Sätze: 25-26-34-36/37/38-14/15-11
S-Sätze: 23-26-36-36/37/39-45-43-36/37-16
RIDADR  UN 3264 8/PG 3
WGK Germany  3
RTECS-Nr. CQ8370000
TSCA  Yes
HS Code  2805 19 10
HazardClass  8
PackingGroup  III
Giftige Stoffe Daten 7440-39-3(Hazardous Substances Data)
Toxizität 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

Gefahreninformationscode (GHS)

Barium Chemische Eigenschaften,Einsatz,Produktion Methoden

Barium Upstream-Materialien And Downstream Produkte

Barium Anbieter Lieferant Produzent Hersteller Vertrieb Händler.