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A7147512

Rubidium standard , analyticalstandard,1000μg/ml,in1mol/LHNO3 , 7440-17-7

CAS NO.:7440-17-7

Empirical Formula: Rb

Molecular Weight: 85.47

MDL number: MFCD00134055

EINECS: 231-126-6

Update time: 2022-07-08

PRODUCT Properties

Melting point: 38-39 °C (lit.)
Boiling point: 686 °C (lit.)
Density  1.53 g/mL at 25 °C (lit.)
solubility  reacts with H2O
form  ingot
color  Silver
Specific Gravity 1.532
Resistivity 11.0 μΩ-cm, 20°C
Water Solubility  soluble in acids and alcohol [HAW93]
Sensitive  moisture sensitive
Merck  13,8363
Exposure limits ACGIH: TWA 2 ppm; STEL 4 ppm
OSHA: TWA 2 ppm(5 mg/m3)
NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3)
CAS DataBase Reference 7440-17-7(CAS DataBase Reference)
EPA Substance Registry System Rubidium (7440-17-7)

Description and Uses

Because rubidium is a much larger atom than lithium or sodium, it gives up its outer valence electron easily, thus becoming a positive ion (oxidation state = Ru+). Rubidium forms numerous compounds, but only a few are useful. One of the main uses for rubidium is as a getter in vacuum tubes used in early radios, TVs, and cathode-ray tubes. When rubidium gas is placed in sealed glass cells along with an inert gas, it becomes a rubidium-gas cell clock. Because of the consistent and exact frequency (vibrations) of it atoms, it is a very accurate timekeeper. Rubidium and selenium are used in the manufacture of photoelectric cells, sometimes called electric eyes. Rubidium is a very caustic alkali (base) with a high pH value that makes it an excellent reducing agent (highly electropositive) in industry and chemical laboratories. A unique use is its ability to locate brain tumors. It is a weak radioisotope able to attach itself to diseased tissue rather than healthy tissue, thus making detection possible.

Safety

Symbol(GHS) 
GHS02,GHS05
Signal word  Danger
Hazard statements  H260-H314
Precautionary statements  P223-P231+P232-P260-P280-P303+P361+P353-P305+P351+P338
Hazard Codes  Xi,C,F
Risk Statements  36/37/38-36/38-34-14/15
Safety Statements  26-36/37/39-43-45-36
RIDADR  UN 2031 8/PG 2
WGK Germany  3
RTECS  VL8500000
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  2805199090

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