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.) |
| storage temp. | 15-25°C |
| solubility | reacts with H2O |
| form | ingot |
| color | Silver |
| Specific Gravity | 1.532 |
| PH | 0.5 (20°C in H2O) |
| Flame Color | Violet red |
| 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) |
| Modulus of Elasticity | 2.35 GPa |
| 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 |
