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)

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