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Rubidium hydroxide

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Rubidium hydroxide Basic information
Rubidium hydroxide Chemical Properties
Safety Information
  • Hazard Codes C
  • Risk Statements 20/21/22-34-22
  • Safety Statements 26-27-28-36/37/39-45
  • RIDADR UN 2677 8/PG 2
  • WGK Germany 3
  • RTECS VL8750000
  • TSCA Yes
  • HazardClass 8
  • PackingGroup II
  • HS Code 28259085
MSDS
Rubidium hydroxide Usage And Synthesis
  • Chemical Propertiesclear colorless solution
  • Physical propertiesGrayish-white orthogonal crystals; hygroscopic; density 3.2 g/cm3; melts at 301°C; very soluble in water (100 g/100 mL at 15°C), the solution highly alkaline; soluble in ethanol.
  • UsesCatalyst in oxidative chlorination.
  • PreparationRubidium hydroxide may be obtained as an intermediate in recovering rubidium metal from mineral lepidolite (see Rubidium). In the laboratory it may be prepared by adding barium hydroxide to a solution of rubidium sulfate. The insoluble barium sulfate is separated by filtration:
    Rb2SO4 + Ba(OH)2 → 2RbOH + BaSO4
    Preparation should be in nickel or silver containers because rubidium hydroxide attacks glass. The solution is concentrated by partial evaporation. The commercial product is usually a 50% aqueous solution.
  • General DescriptionA clear aqueous solution. Very caustic. Very irritating to skin and eyes. Used in electric storage batteries.
  • Air & Water ReactionsAbsorbs carbon dioxide from the air. May generate large amounts of heat when diluted with water.
  • Reactivity ProfileA strong base. Forms caustic solution in water [Merck 11th ed. 1989].
  • HazardStrong irritant to tissue.
  • Health HazardTOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
  • Fire HazardNon-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
  • Safety ProfileModerately toxic by ingestion. A powerful, corrosive irritant to skin, eyes, and mucous membranes. When heated to decomposition it emits toxic fumes of RbzO. See also POTASSIUM HYDROXIDE and RUBIDIUM.
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