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
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 |