Rubidium hydroxide

Rubidium hydroxide
Names
IUPAC name
Rubidium hydroxide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.013.806 Edit this at Wikidata
RTECS number
  • VL8750000
UNII
  • InChI=1S/H2O.Rb/h1H2;/q;+1/p-1 checkY
    Key: CPRMKOQKXYSDML-UHFFFAOYSA-M checkY
  • InChI=1/H2O.Rb/h1H2;/q;+1/p-1
    Key: CPRMKOQKXYSDML-REWHXWOFAO
  • [Rb+].[OH-]
Properties
RbOH
Molar mass 102.475 g·mol−1
Appearance white solid,
hygroscopic
Density 3.1 g/mL at 25 °C
Melting point 382 °C (720 °F; 655 K) dec
Boiling point 1,390 °C (2,530 °F; 1,660 K)
173 g/100 mL (30 °C)
Solubility soluble in ethanol
Acidity (pKa) 15.4[1]
Thermochemistry
−413.8 kJ/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Corrosive
GHS labelling:[2]
GHS05: CorrosiveGHS07: Exclamation mark
H302, H312, H314, H332
P260, P264, P270, P271, P280, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P330, P362+P364, P363, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazard ALK: Alkaline
3
0
1
ALK
Flash point Non-flammable
Related compounds
Other cations
 Lithium hydroxide
Sodium hydroxide
Potassium hydroxide
Cesium hydroxide
Related compounds
 Rubidium oxide (+1)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Rubidium hydroxide is the inorganic compound with the formula RbOH. It consists of rubidium cations and an equal number of hydroxide anions. It is a colorless solid that is commercially available as aqueous solutions from a few suppliers. Like other strong bases, rubidium hydroxide is highly caustic. Rubidium hydroxide is formed when rubidium metal reacts with water.[3]

Uses

Rubidium hydroxide is rarely used in industrial processes because potassium hydroxide and sodium hydroxide can perform nearly all the same functions of rubidium hydroxide. Metal oxide catalysts are sometimes modified with rubidium hydroxide.[3]

References

  1. ^ "Sortierte Liste: pKb-Werte, nach Ordnungszahl sortiert. - Das Periodensystem online" (in German).
  2. ^ PubChem. "Rubidium hydroxide". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-01-19.
  3. ^ a b Lenk, Winfried; Prinz, Horst; Steinmetz, Anja (2010). "Rubidium and Rubidium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a23_473.pub2. ISBN 978-3-527-30673-2.

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